spec uses non-British English in many places

it doesn't matter if we use british english or american english, but we should try to be consistent, and for better or worse our convention is for british english. The use of 'color' in text sections sets false expectations about the convention.

Start by searching the specification text for “color” and other American English spellings, then review the surrounding wording against the project’s British English convention. Done means the affected text uses consistent British English without changing the protocol meaning.

Written by the indexing model from the issue text.