Welcome to TVPaint Community forums !

I think you should like a "Magic Color Eraser Tool that's not in "Custom" Air Brush. The "Magic Color Eraser Tool" can be added with more options, like to remove colors more accurately without erasing other colors from lines. Maybe add a range option? Also maybe you can add another another option, like erasing like 2 or 3 specifically colors with one tool with one stroke, while leaving the other colors 100% intake?


Or maybe just add to Air Brush "B Color to Erase" with maybe range?

Or maybe put it in Eraser tool with "B Color to Erase" and "A Color to Erase" mode and add Color Range.