I'm not so sure it's the colours that show the really nasty bits. It's the rapid changes of colour and solid 'squirly' (I like that word) bits that I avoid and this policy has served me well over the past few years. I do avoid the intense solid centres (white on my aircraft) but generally have no problem with greens, yellows and sparse reds - as long as the build-up is gradual. As for the ride, I assume that if my tea isn't spilt, the Gin and Tonics in the back will be OK as well. As regards company policy, that is delegated to the crew - as it should be.
PM