EzekielRaiden
Follower of the Way
Depends. I had taken that as simply a preplanned backstory thing, e.g. "Agnar the Wrinklebrained prefers to wear the heraldic colors of his clan, primarily blue." But if it's meant to be something said later, e.g. session 7 establishes that Agnar the Wrinklebrained has always worn blue shirts, then there doesn't seem to be much gap there. Same as establishing some important cultural fact "after" it should already be super well-known, or any other such "this has always been true we just didn't mention it until now" stuff.Before I delve into a detailed answer, do you mind to elaborate on what if any difference you see with that and the third bullet point about deciding your shirt is blue?
The only real difference I can see with the "My shirts are, and have always been, blue" and "My character hates, and has always hated, elves" is that the former is more conceptually self-contained, but not totally so, while the latter is more outward-focusing, but again not totally so. That is, for example, the resolution to a mystery in my DW game once actually did turn on a player noticing that a fancy dress failed to remain a single distinct color (revealing that its wearer was a talented illusionist, and thus could have pretended to look like someone else, e.g. the murder victim, AFTER his actual time of death), while hatred of elves could end up being pure color in a game where elf NPCs are rare or irrelevant. The elf-hate is more likely to end up mattering, but neither has any guarantee of relevance nor lack thereof.