Colossus (80's costume)
In the 1980's, a lot of the X-Men got new looks. Wolverine got his brown and tan costume, Storm got a mohawk - even Professor X wore a bright yellow jumpsuit for a time. And Colossus got this new outfit, inspired by Russian design.
I always liked this look for him. His traditional yellow/red costume feels too loud and circus-like for me. This costume,
with it's simple colors and lines, puts the emphasis on the interesting visual of his organic metal skin.