As luck would have it, editing a theme, I had to manually go into Workshelf and change the text type and coloration - It seems you have empty and inactive Button3= , Button4= etc already like a placeholder?

I see both sides here... Honestly if it comes down to user choice, it has often been said that more than two choices should be avoided. One one hand, if you are giving one choice being coloring and no bitmaps, it kind of forces the user into default settings or coloring. If the skinner only creates an active and inactive like it is currently, then nothing changes - However, if in some of the newer themes that 'might' come out, the user has the option of thematic or coloring.

- just an observation


All of that said, I know you have far more important things that take precedence and so they should, so if you can do the coloring without taking too much time away, we can always revisit the bitmaps another time

P.S - I could have got really convoluted and suggested that if a skinner created 12 different TAB buttons, the user could select their favorite from those 12 as their main TAB

@NEXTER - Coloring in different colors I am not huge on either with coloring bitmaps, but it depends on whether it's an actual color change or simply a glow around the buttons, the latter would likely work better.... especially if the user has a color wheel to choose from so they can do variants of the dominant color of the theme they are using and save per theme.