Originally Answered: What color do you get if you mixed red and black together? You will get a dark red, depending on the amount of black added and it would be a shade of red.
A cool blue tone could be your answer.
A light grey trouser will work well with a dark red, blue, green or black.
Nantucket reds pair perfectly with beige shoes.
Grey and red mixed gives tones of red from pink at the lightest through blush, blood, garnet to wine at the darkest.
For a muted option, look to neutrals of brown and beige to add a cool, calm dimension to your red pants outfits.