User blog comment:3primetime3/Color Bomb vs Colour Bomb/@comment-4189499-20140126110719

Hmm, let us examine these 2 words:
 * Color: Americans
 * Colour: English, Scottish, Welsh, Irish, Australian, Kiwi (New Zealander-ish) etc.

Seems to me the conclusion is obvious. Most of the Anglophone world spells it colour. In fact, the reason the spelling "color" exists at all was because an official board in the US just over 100 years ago decided that normal spelling was too hard for Americans to learn, so they simplified a bunch of words. However, most of the world were perfectly capable of handling the "ou"s and the "s"s left over to signify the languages history, and so we should go with the most used spelling and the proper spelling: colour.