Really, you wouldn't want to use the "everything being dirty is historically accurate to medieval times" excuse as an argument anyway, because then people can whip out the historical tidbit about how ridiculously colorful fashion could be back then.
You want all dark clothes? I'm sorry, I thought historical accuracy was important to you!
All joking aside, I really like the dark clothing fantasy aesthetic, and don't blame anyone who favors it over more historically accurate clothing.
I just want some outfits that look like they've been washed, SKYRIM. Yeah, that's right. I'm calling out one of my favorite games on its bullcarp again.