If you spill something red on yourself in winter you should pardon yourself immediately and try to find something else to wear. It's very dangerous to wear red in winter, and even if it seems rude, make sure you pardon yourself right away and get that taken care of!
If you don't pardon yourself fast enough the winter shaman (しゃ) will burst in and cast a spell on you, taking away all the clothes that have red on them! Now you have to pardon yourself for being naked!
Currently there are no similar looking kanji which exist in the WaniKani learning system