Thanks, great!... I will study it.
From InDesign CC it's not possible to use colour in ScriptUI windows. Or change the type size of any text used in ScriptUI windows. Much to everyone's chagrin.
Thanks for your message: indeed, that's chagrin!!! ...why these limitations for such a good tool.???
Fortunately, I am using CS6. As long as I can.
before InDesign was ported to 64-bit, InDesign CS6 and below, scriptUI was able to do what you want.
( ACP )