[gitgud]

Nice idea, but the name doesn't quite fit the game... I would expect to be able to vote for my favourite color, this is more like a "color election"

[akerr]

…and what would you do in a colour election?

[scheesman]

Pick the option that least sucks amongst options selected by someone other than myself.

[mcv]

Vote for the lesser ugly.

[sweezyjeezy]

That won't give you a ranking in practice - you'd get 90% of colours receiving 0 votes so there's no way to distinguish them. I think the output of this game would be more interesting to analyse.