Would this outfit keep me warm?

Tomorrow is supposed to be pretty cold so for school to stay warm (and stay cute of course too lol) i am thinking about wearing my brown carhartt overalls over a black long sleeve underarmor shirt and with my ugg boots but i don't know if i should wear my light brown ones or dark brown ones but im feeling my dark brown ones. So would this outfit keep me warm but not too hot either? Should i wear my light brown uggs or my dark brown uggs?