Thanks for the comment on my program.
My suggestions about colourizer:
1. I think you should add colour conversion templates instead for constant list. For example, warcraft colour template:
|c00$RR$GG$BB$text|r - this will be replaced with proper red, green, blue and text values.
2. Also, "Gradient colour" checkbox is more associated with "Select your Colours", than with "Conversion Type", isn't it?
3. And preview of coloured text would be nice.