So i came across an easily noticeable/reproductible bug with the paint-brush (which is much appreciated by the way for a little customisation!).

I painted  my base green, and i noticed if i quit & re-load (no need to quit the program) some rooms go back to the default color. It is only the "craftbench interior room", "Chemistry Lab", "interior-garden patches", & "reservoirs" for the moment. I saw that is was always the same  type of rooms that are problematic... (blank rooms, "fan rooms", "stockage rooms",  and airlocks seems to retain their colors ) But they should all be tested! ʕ•ᴥᵕʔ

I guess it is only a variable that is lost in the saving-reloading process etc... should be easy to see & fix!  ₍ᐢ•ﻌ•ᐢ₎

In addition, when using the paintbrush to paint "special rooms", the left-click of the mouse  also "trigger the crafting window" of said rooms/bench... it is a little unsettling! ʕᵔᴥᵔ࣢ʔ 

Thinking about that, i would make the paintbrush "standalone" (no interfering with crafting) paints with left click , and deactivate too the normal right click (remove object on said tile) to quickly pass to the next color! ʕᵔᴥᵔʔ It seems smoother that way (and intuitive?!). Moving the mouse to select the tiny square for a color is a little cumbersome i observed! ʕ-ᴥ-ʔ An easy alternative like  right-click should help! <3