您需要什么颜色?(翻译成英语)

what color do you want?

What colour do you want?
或者
What colour do you need?

What color are you need ?即可

个人认为，what color do you prefer ？更舒服

我觉得用which更地道，which color do you prefer?

最有礼貌的说法:W hich colour would you like?