Frontier is planning to add an ingame UI color change feature.
The game releases on Tuesday, at this point "Frontier is planning to..." is meaningless. When people buy this game and play it on release, they're going to get a game that is missing very basic features. If I was pointing out there is no station walking and you say "that will be in an expansion" then yes, that is acceptable, but to be missing something like this is just garbage. This game is still in beta and everyone knows it.
Game breaking bugs I've personally encountered so far:
1. Security forces attack even if you're not wanted. Attacked them back will just result in more security forces warping in and attacking you, oh, you'll also get a bounty which you'll have to pay off.
2. Landing pads sometimes glitch out, as a result the game thinks you're "loitering" and the station begins shooting at you at nearly instantly destroying your ship.
3. My weapons were bugged as "deployed" and as a result I couldn't enter hyperspace or supercruise. Had I not been near a station to dock and reset the bug, I would have had to self-destruct my ship just to continue playing the game.
And that is just me, personally. The forums are filled with people who can't even play the game because it gets stuck at the loading screen... They released two separate patches claiming to fix that.