Earlier quoted context omitted.
A word of note: In British English "color" is spelt "colour"
I'm based in the US, where it's spelled without the "u". Quite a few examples of this spelling difference - humo(u)r, behavio(u)r etc. Oh and "spelt" is "spelled". Isn't English fun! :)
Maybe this is my own idiosyncrasy though and not what others would do. I’ve never even thought about it until just now.