Board Thread:Speculation House/@comment-226878-20140806074858/@comment-24.167.0.38-20150128062209

Maybe the colors they were in the opening of volume 2 can help. here's how I see it

Cardin: Red or scarlet since that's the color of the robes cardinals wear.

Russel: Green or Lincoln green since it's the color of clothes he wore and was associated with his merry men.

Dove: Yellow or bronze yellow since the Trojan war took place in the bronze age and Hector's bronze armor.

Sky: blue but not sure what type. it could be glaucous ice or frost blue since Loki was a frost giant.