You'd first have to filter out the dynamic data for color that automatically gets sent down from the server:
Code:
DynamicDataFilter="FBFF"
(I believe that's correct)
Then you could probably setup a check for every time the text changes to do a number evaluation.
Code:
OnTextChanged="iPct=int(LocalText)
COND=(iPct > 99)
Color=(COND ? '#FF0000' : '#00FF00')"
Line 1: changes percentage into integer and removes decimal point
Line 2: check to see if integer is greater than 99
Line 3: if it is... set color to red, else set to green
Fairly sure this would work just fine. The color values are open for tweaking, they're just straight red/green.