I spell it colour. How do you spell colour? Do you spell it with a U. Do you spell it with out a U but spell other words like favourite, harbour, honour and savour with a U. Do you spell it with the U but other words like harbour and honour without a U? Or do you just spell colour and all words like it without the U? How do you spell colour and other words like it? I usually spell all words like harbour and favourite with the U.