I have the complete opposite opinion, than norcom and eree
Would happily pay a bit more, if I got a kite exactly as I like it, for one - or at least pay a bit for having the ability to choose between colours.
Simply hate kites with simple uniform colour
(although I like the "idea" of simplicity, but thats another issue...)
One example is, that I deliberately choose different colours for all my kites, if possible - so my friends can see what size I am using (and they typically do the same - so I can see what size THEY are using - important when riding waves where the wind is often sideshore and you can not see how much wind out at the break - but when you know your friends over years and exactly what they use when you use etc, you know exactly what size to choose, when you take a look at what colours they got out there)
Secondly, a black kite is the worst of all IMO, as you have no chance of being spotted, if you are in trouble far out - compared to a brighter colour
One of my kites are very black, but has fortunately almost half of it blue and white and purple, which helps (personally one of the best looking ones I've got, but so what...)
This kite is not as "safe" in terms of ability to see and find
Colour design is so individual, especially whether simple and clean designs, or lively exiting designs, so will not go into that here....