How to draw this CSS3 shape? - html

Question

Does anyone know how to make the blue shape above in css3?

Answer 1

use css border-radius and box-shadow
<div class=social></div>
demo: http://jsfiddle.net/vS7bS/4/
.social{
margin: 100px;
width: 150px;
height: 150px;
position: relative;
background: green;
border-radius: 100%;
border: 2px solid black;
overflow:hidden;
box-shadow: 100px 0 0 -2px blue, 100px 0 0px 0px black;
}
.social:after{
content: '';
position: absolute;
left: 100px;
top: 0;
width: 100%;
height: 100%;
border-radius: 100%;
background: red;
box-shadow: 0 0 0 2px black;
}
Demo 2:http://jsfiddle.net/vS7bS/5/
Demo with :hover http://jsfiddle.net/vS7bS/6/
<div class=social>
<section>
<div></div>
<div></div>
</section>
<div></div>
</div>
css
section{
position:relative;
width:150px;
height:150px;
overflow:hidden;
border-radius:100%;
box-shadow: 0 0 0 2px black;
z-index: 10;
}
section div{
width: 170px;
height: 170px;
border-radius:100%;
border:2px solid black;
position:absolute;
}
section div:nth-child(1):hover{
background:orange;
}
section div:nth-child(2):hover{
background:#333;
}
section div:nth-child(1){
left: -8px;
top: -3px;
background: blue;
}
section div:nth-child(2){
width: 150px;
height: 150px;
border-radius: 100%;
border: 2px solid black;
background: red;
right: -76px;
position: absolute;
}
.social{
position:relative;
width: 156px;
height: 156px;
margin:100px;
}
.social >div{
width: 150px;
height: 150px;
border-radius: 100%;
border: 2px solid black;
background: yellow;
right: -70px;
top: 0;
position: absolute;
z-index: 1;
}
.social >div:hover{
background:skyblue;
}

Answer 2

Try this
jsfiddle DEMO
result
#shape {
position:absolute;
top:100px;
left:100px;
width: 80px;
height: 80px;
background: blue;
margin: 3px 0 0 30px;
/* Rotate */
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
transform: rotate(-45deg);
/* Rotate Origin */
-webkit-transform-origin: 0 100%;
-moz-transform-origin: 0 100%;
-ms-transform-origin: 0 100%;
-o-transform-origin: 0 100%;
transform-origin: 0 100%;
-moz-border-radius: 60px 0px;
-webkit-border-radius: 60px 0px;
border-radius: 80px 0px;
}