I don't own red clothes but those colours are required for Thursday?

So at my school there's this event on Thursday where we have to dress up in our team colours. My team is red, it is freezing cold where i live and i only have a red short sleeve t-shirt. I am not able to purchase one by Thursday, i don't wear pink, so i can't wear pink, and i don't wear white, and i can't wear blue because that's one of the other teams colours. I'll be wearing jeans and the t-shirt but i need a jacket, any ideas on what i should do?