Originally Posted by relimbeck
Hi there. What if "Tint track panel backgrounds" is grayed out? I see it in preferences but Reaper will not let me click it.
Because you are using a modern theme that uses the new image-based custom colouring method. Those preferences have no function on such a theme, but in return you get selectively coloured areas as chosen by them theme maker.
If you use an older theme, such as the V3 default shown in your screenshot, those preferences will be available and stuff will take colour just as it used to.
If you want to keep using a modern theme but have it show more
custom colour, a simple bit of image editing is required on a few background images. You may not need to do this yourself; altered images for a number of themes have been posted on this forum if you look around.