Pretty sure that's one of the things CBS ruled on during Beta...
The colors are a major sticking point. The LCARS were originally going to be a brighter version of the TNG color scheme and CBS shot that down. I'm pretty sure the reason we ended up with blue LCARS was because that was the easiest way to get the existing graphics approved, to monochrome them. The original textures cropped up a few places by mistake and in some of the alpha footage for the game.
I recall it being beige, lavender, and primary colors.
If we ever do get control over that, I suspect one limitation will be that LCARS have to be monochrome or duotone.