I have a div here with a button:
I want the contents of the div to be opaque while still keeping the semi-opaque background color.
The box will contain a menu.
#calculationMenu {
text-align: center;
margin-left: auto;
margin-right: auto;
border: 1px solid #1F5899 ;
height: 200px;
width: 400px;
padding: 20px;
opacity:0.4;
background-color: #6AA6D9;
}
div.calcMenuContents {
opacity: 1;
}
The Run button is contained within the calcMenuContents div:
<div id="calculationMenu">
<div id="calcMenuContents">
<button onclick="runCalculations(2)" class="insideMenu">Run</button>
</div>
</div>
How may I make it so that the calcMenuContents are not semi-transparent?
Update: Thank you, BoltClock for the alternate solution (to set specific attributes of a div, instead of for the entire div).
My only issue is that the parent
There is a solution! Use rgba background values and you can have transparency wherever you want :
#calculationMenu
{
background: rgba(0, 0, 0, 0.4);
/*opacity: 0.4;*/
padding: 20px;
}
div.calcMenuContents
{
background: rgba(255, 0, 0, 1);
/*opacity: 1;*/
}
http://jsfiddle.net/Kyle_Sevenoaks/TK8Lq/1/
For text, you can just use the same rgba code, but set to the color property of CSS:
color: rgba(255, 255, 255, 1);
But you must use rgba on everything for this to work, you have to remove the opacity for all parent elements.
http://jsfiddle.net/Kyle_Sevenoaks/TK8Lq/2/
use rgba()
You can't really cancel out a parent element's opacity, but if the only parts of the parent element that will be semi-transparent are its background and its border, you can replace their hex colors with rgba() values based on the opacity you had given it, and remove the opacity declarations altogether:
#calculationMenu {
text-align: center;
margin-left: auto;
margin-right: auto;
border: 1px solid rgba(31, 88, 153, 0.4);
height: 200px;
width: 400px;
padding: 20px;
background-color: rgba(106, 166, 217, 0.4);
}
you can change the background-color into an RGBA, so you would get:
background-color: rgba(106, 166, 217, 0.4);
If I'm right
You can't change the opacity of child elements. Try to use semi-transparent .png image as background of "calculationMenu" div instead of solid color background and opacity.
Related
#hex{ } is not working ( have tried edge, chrome, opera works nowhere) while img#/#hex{}(which i found from chrome developer tools works everywhere)
here is my html code:
<img src="https://emojipedia-us.s3.amazonaws.com/thumbs/240/apple/118/bacon_1f953.png" alt="bacon-img">
<img id="#hex" src="https://emojipedia-us.s3.dualstack.us-west-amazonaws.com/thumbs/120/apple/325/broccoli_1f966.png" alt="broccoli-img">
here is my css code that doesn't work even if i tried img#hex or simply #hex
img{
background-color: rgba(0, 255, 0, 0.445);
border-radius: 20px;
}
img:hover{
background-color: transparent;
border-radius: 25px;
#hex{
background-color: rgba(255, 0, 0, 0.445) ;
border-radius: 10px;
}
here is my css code that works partially: as hover dosen't work on img#\#hex
However, I do not know how img#\#hex works or why does it work.
img{
background-color: rgba(0, 255, 0, 0.445);
border-radius: 20px;
}
img:hover{
background-color: transparent;
border-radius: 25px;
img#\#hex {
background-color: rgba(238, 255, 0, 0.445) ;
border-radius: 10px;
}
img 1 what is when it is not hoveredenter image description here
img 2 when hovered on first img enter image description here
img 3 when hovered over second img enter image description here
have I made some mistake somewhere or is there some problem in my code here or anything of that sort?
please tell me.
thank you in advance!
i was expecting :hover
to
work with img#\#hex
and give a transparent background while hovering!
# in css is a selector for ID, to fix your code change the id of the image to hex.
And make the proper changes to fix your css selectors
<img id="hex" src="https://emojipedia-us.s3.dualstack.us-west-amazonaws.com/thumbs/120/apple/325/broccoli_1f966.png" alt="broccoli-img">
Also consider removing the img selector, as the id should be unique you do not need the img part.
#hex {
background-color: rgba(238, 255, 0, 0.445) ;
border-radius: 10px;
}
I have the following code:
.wrapper {
background-color: rgba(0,0,255,1.0);
}
.inner {
background-color: rgba(255, 0, 0, 0.5);
}
<div class="wrapper">some text<span class="inner">other text</span></div>
My intention was that the <span> would have a light red color but instead I got red blended with the wrapper blue.
Is there any easy way to make this work as I expected?
you can put the same span just behind the actual span, but with a white background-color. However, it's not a sustainable solution, and you should not use rgba color to do that.
Due to the use of rgba(255,0,0,0.5); you have an alpha option which causes semi transparency, your best bet is to simply use rgb(255,0,0); without the alpha or optionally set your alpha to 1 rgba(255,0,0,1);
Keep another element that is a wrapper to your span. and give it background white.
.wrapper {
background-color: #5555ff;
position: relative;
padding: 20px;
}
.inner {
background-color: rgba(255, 0, 0, 0.5);
display:block;
}
.fake{
display:inline-block;
background: #fff;
}
<div class="wrapper">
some text
<div class="fake">
<span class="inner">other text</span>
</div>
</div>
Alternate solution:
You can give this color #ff8080 to your span which does not have transparency. It will give the same effect.
Best way is probably to just use a color without opacity, other than that you could just wrap the highlight color with a white background wrapper...
.wrapper {
background-color: rgba(0,0,255,1.0);
}
.inner {
background-color: rgba(255, 0, 0, 0.5);
}
.inner-wrap {
background-color: #FFF;
}
<div class="wrapper">some text<span class="inner-wrap"><span class="inner">other text</span></span></div>
I am working on a webpage and I want to put a button on a transparent div that shows the background image. But when I place the button it is also transparent. How can I make it not transparent?
div.background {
background: url(klematis.jpg) repeat;
border: 2px solid black;
}
div.transbox {
margin: 30px;
background-color: #ffffff;
border: 1px solid black;
opacity: 0.6;
filter: alpha(opacity=60); /* For IE8 and earlier */
}
div.transbox p {
margin: 5%;
font-weight: bold;
color: #000000;
}
<div class="background">
<div class="transbox">
<p>This is some text that is placed in the transparent box.</p>
<input type="button" value="Ok">
</div>
</div>
Use the rgba() color method instead of opacity:
div.background {
background: url(klematis.jpg) repeat;
border: 2px solid black;
}
div.transbox {
margin: 30px;
background-color: rgba(255, 255, 255, 0.6);
border: 1px solid black;
}
div.transbox p {
margin: 5%;
font-weight: bold;
color: #000000;
}
<div class="background">
<div class="transbox">
<p>This is some text that is placed in the transparent box.</p>
<input type="button" value="Ok">
</div>
</div>
With opacity, the effect applies to the entire element, including child elements and content.
From MDN:
[Opacity] applies to the element as a whole, including its contents,
even though the value is not inherited by child elements. Thus, an
element and its contained children all have the same opacity relative
to the element's background, even if the element and its children have
different opacities relative to one another.
The exception to this rule is background-color set with rgba().
The rgba() color model allows for the opacity to be set via the alpha channel.
So you could set the parent to div { background-color: rgba (255, 255, 255, 0.6); }, and that would set the opacity to 0.6 on the background-color alone. Child elements would be unaffected.
Learn more here: A brief introduction to Opacity and RGBA
For opacity and images see:
Can I set an opacity only to the background image of a div?
CSS: set background image with opacity?
I'm trying to do something like this for a client who has a blog.
She wanted a semi transparent border. I know that's possible with making it just a background. But I can't seem to find the logic/code behind this kind of css technique for banners. Does anybody know how to do this? It would be a lot of help because that's the look my client's wanting to achieve for his blog....
Well if you want fully transparent than you can use
border: 5px solid transparent;
If you mean opaque/transparent, than you can use
border: 5px solid rgba(255, 255, 255, .5);
Here, a means alpha, which you can scale, 0-1.
Also some might suggest you to use opacity which does the same job as well, the only difference is it will result in child elements getting opaque too, yes, there are some work arounds but rgba seems better than using opacity.
For older browsers, always declare the background color using #(hex) just as a fall back, so that if old browsers doesn't recognize the rgba, they will apply the hex color to your element.
Demo
Demo 2 (With a background image for nested div)
Demo 3 (With an img tag instead of a background-image)
body {
background: url(http://www.desktopas.com/files/2013/06/Images-1920x1200.jpg);
}
div.wrap {
border: 5px solid #fff; /* Fall back, not used in fiddle */
border: 5px solid rgba(255, 255, 255, .5);
height: 400px;
width: 400px;
margin: 50px;
border-radius: 50%;
}
div.inner {
background: #fff; /* Fall back, not used in fiddle */
background: rgba(255, 255, 255, .5);
height: 380px;
width: 380px;
border-radius: 50%;
margin: auto; /* Horizontal Center */
margin-top: 10px; /* Vertical Center ... Yea I know, that's
manually calculated*/
}
Note (For Demo 3): Image will be scaled according to the height and
width provided so make sure it doesn't break the scaling ratio.
You can also use border-style: double with background-clip: padding-box, without the use of any extra (pseudo-)elements. It's probably the most compact solution, but not as flexible as the others.
For example:
<div class="circle">Some text goes here...</div>
.circle{
width: 100px;
height: 100px;
padding: 50px;
border-radius: 200px;
border: double 15px rgba(255,255,255,0.7);
background: rgba(255,255,255,0.7);
background-clip: padding-box;
}
If you look closely you can see that the edge between the border and the background is not perfect. This seems to be an issue in current browsers. But it's not that noticeable when the border is small.
Using the :before pseudo-element,
CSS3's border-radius,
and some transparency is quite easy:
LIVE DEMO
<div class="circle"></div>
CSS:
.circle, .circle:before{
position:absolute;
border-radius:150px;
}
.circle{
width:200px;
height:200px;
z-index:0;
margin:11%;
padding:40px;
background: hsla(0, 100%, 100%, 0.6);
}
.circle:before{
content:'';
display:block;
z-index:-1;
width:200px;
height:200px;
padding:44px;
border: 6px solid hsla(0, 100%, 100%, 0.6);
/* 4px more padding + 6px border = 10 so... */
top:-10px;
left:-10px;
}
The :before attaches to our .circle another element which you only need to make (ok, block, absolute, etc...) transparent and play with the border opacity.
use rgba (rgb with alpha transparency):
border: 10px solid rgba(0,0,0,0.5); // 0.5 means 50% of opacity
The alpha transparency variate between 0 (0% opacity = 100% transparent) and 1 (100 opacity = 0% transparent)
This question already has answers here:
How do I reduce the opacity of an element's background using CSS?
(29 answers)
Closed yesterday.
I want to make the list menu's background disappear by using opacity, without affecting the font. Is it possible with CSS3?
now you can use rgba in CSS properties like this:
.class {
background: rgba(0,0,0,0.5);
}
0.5 is the transparency, change the values according to your design.
Live demo http://jsfiddle.net/EeAaB/
more info http://css-tricks.com/rgba-browser-support/
Keep these three options in mind (you want #3):
1) Whole element is transparent:
visibility: hidden;
2) Whole element is somewhat transparent:
opacity: 0.0 - 1.0;
3) Just the background of the element is transparent:
background-color: transparent;
To achieve it, you have to modify the background-color of the element.
Ways to create a (semi-) transparent color:
The CSS color name transparent creates a completely transparent color.
Usage:
.transparent{
background-color: transparent;
}
Using rgba or hsla color functions, that allow you to add the alpha channel (opacity) to the rgb and hsl functions. Their alpha values range from 0 - 1.
Usage:
.semi-transparent-yellow{
background-color: rgba(255, 255, 0, 0.5);
}
.transparent{
background-color: hsla(0, 0%, 0%, 0);
}
As of the CSS Color Module Level 4, rgb and hsl works the same way as rgba and hsla does, accepting an optional alpha value. So now you can do this:
.semi-transparent-yellow{
background-color: rgb(255, 255, 0, 0.5);
}
.transparent{
background-color: hsl(0, 0%, 0%, 0);
}
The same update to the standard (Color Module Level 4) also brought in support for space-separated values:
.semi-transparent-yellow{
background-color: rgba(255 255 0 / 0.5);
}
.transparent{
background-color: hsla(0 0% 0% / 0);
}
I'm not sure why would these two be any better than the old syntax, so consider using the a-suffixed, comma-separated variants for greater support.
Besides the already mentioned solutions, you can also use the HEX format with alpha value (#RRGGBBAA or #RGBA notation).
That's contained by the same CSS Color Module Level 4, so it has worse support than the first two solutions, but it's already implemented in larger browsers (sorry, no IE).
This differs from the other solutions, as this treats the alpha channel (opacity) as a hexadecimal value as well, making it range from 0 - 255 (FF).
Usage:
.semi-transparent-yellow{
background-color: #FFFF0080;
}
.transparent{
background-color: #0000;
}
You can try them out as well:
transparent:
div {
position: absolute;
top: 50px;
left: 100px;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
border: 1px dashed grey;
background-color: transparent;
}
<img src="https://via.placeholder.com/200x100">
<div>
Using `transparent`
</div>
hsla():
div {
position: absolute;
top: 50px;
left: 100px;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
border: 1px dashed grey;
background-color: hsla(250, 100%, 50%, 0.3);
}
<img src="https://via.placeholder.com/200x100">
<div>
Using `hsla()`
</div>
rgb():
div {
position: absolute;
top: 50px;
left: 100px;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
border: 1px dashed grey;
background-color: rgb(0, 255, 0, 0.3);
}
<img src="https://via.placeholder.com/200x100">
<div>
Using `rgb()`
</div>
hsla() with space-separated values:
div {
position: absolute;
top: 50px;
left: 100px;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
border: 1px dashed grey;
background-color: hsla(70 100% 50% / 0.3);
}
<img src="https://via.placeholder.com/200x100">
<div>
Using `hsla()` with spaces
</div>
#RRGGBBAA:
div {
position: absolute;
top: 50px;
left: 100px;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
border: 1px dashed grey;
background-color: #FF000060
}
<img src="https://via.placeholder.com/200x100">
<div>
Using `#RRGGBBAA`
</div>
yes, thats possible. just use the rgba-syntax for your background-color.
.menue {
background-color: rgba(255, 0, 0, 0.5); //semi-transparent red
}
Here is an example class using CSS named colors:
.semi-transparent {
background: yellow;
opacity: 0.25;
}
This adds a background that is 25% opaque (colored) and 75% transparent.
CAVEAT
Unfortunately, opacity will affect then entire element it's attached to.
So if you have text in that element, it will set the text to 25% opacity too. :-(
The way to get past this is to use the rgba or hsla methods to indicate transparency* as part of your desired background "color". This allows you to specify the background transparency*, independent from the transparency of the other items in your element.
Technically we're setting the opacity, though we often like to speak/think in terms of transparency. Obviously they are related, inverses of each other, so setting one decides the other.
The number specified is the opacity %. 1 is 100% opaque, 0% transparent & vice versa).
Here are 3 ways to set a blue background at 75% opacity (25% transparent), without affecting other elements:
background: rgba(0%, 0%, 100%, 0.75)
background: rgba(0, 0, 255, 0.75)
background: hsla(240, 100%, 50%, 0.75)
In this case background-color:rgba(0,0,0,0.5); is the best way.
For example: background-color:rgba(0,0,0,opacity option);
Try this:
opacity:0;
For IE8 and earlier
filter:Alpha(opacity=0);
Opacity Demo from W3Schools
Yes you can just plain text as
.someDive{
background:transparent
}
For your case, we can use rgba():
First, we manipulate the background-color, and use rgba.
.selector {
background-color: rgba(0, 0, 0, 0.3);
}
Now what this does is, it basically adds an opacity to your element, along with the black background color. This is how it'd look when you run it.
body {background-color: #0008f3;}
.container {
height: 100px;
width: 100px;
background-color: rgba(255,255,255,0.5);
}
<body>
<div class="container"></div>
</body>
full transparent -> .youClass{background: rgba(0,0,0,0.001);}