I do.
I use all of my bags year round. I don't have a white bag, but if I did I would use it. There are whilte wool coats and dresses, so why should we not carry a white purse if we want to do so. I have reds, browns, black, Kelly green, orange, blue, tan and purple bags. Although I don't pay any attention to "rules" as such, I probably wouod not carry a straw bag in the winter, lol.
And I live in an area where we have four distinct seasons. Which begs the question...if they follow the "rules" would those who live where it is always warm/tropical, etc., never get to carry dark bags?