Font color expression for group sums - reporting-services

Question

I have data in an SSRS report that groups and provides percentages. I need to change the font color for the percentages and I can't figure out how to create the expression.
Currently I obtain the percentage with this formula:
Sum(Fields!Time_Msg.Value)/Count(Fields!Driver.Value)
The Time_Msg field is obtained from SQL. I want the font expression to be the greater of three colors using this formula:
IIF(Fields!Time_Msg.Value = 1, "green",
IIF(Fields!Time_Msg.Value = 0
And Fields!Time.Value > Fields!TimeB.Value, "red", "yellow"))
So essentially if the record is on time the font will be green, if the record is late then red and early then yellow.
But what do you do when providing grouping sums? If from all the records the greatest value is green, then the font for the grouping sum should be green, etc.

Answer 1

Sorry for formatting as I'm new to this forum..
go to Textbox properties-> Font -> Color and type an expression like this
Instead of using IIF please try to use Switch statement.
= switch(Fields!Time_Msg.Value = 1, "green",
Fields!Time_Msg.Value = 0
And Fields!Time.Value > Fields!TimeB.Value, "red")
Note: Put your condition in switch statement.
Let me know if this works

Answer 2

You can use custom code in your project
Function SetColor(ByVal Value As Integer) As String
Dim Ret as string
Dim doubleVal As Double
Ret = "Blue"
Dim Val As Double
doubleVal = System.Convert.ToDouble(Value)
if Value >= .86 then
Ret = "OliveDrab"
ElseIf Value <=.86 then
Ret = "IndianRed"
end if
End Function
assign whatever numbers you want to whichever colours you are using (I'm using greater or less than 86%) and set the font colour expression to =Code.SetColor(Me.Value)