I'm not sure this is the right place to bring such stuff, if not then sorry.

I've been trying to change the colors for the notification app today (not really a fan of the original), and I noticed that there are many defines such LV_COLOR_ORANGE in many places, or sometimes even lv_color_hex(0x888888). So if you want to change colors for whole screen, you need to find all occurrences and replace them with new color.

I think if we had some global defines in separate header file, with more user-(programmer-)friendly names, like LV_COLOR_BG_CLOCKAPP, LV_COLOR_TEXT_NOTIFICATIONTITLE or something, with LV_COLOR_RED/BLUE/something assigned to it, managing themes would become way easier.
Creators of new watchfaces/themes would just have to work with single .h file and it all would become a bit more readable.