So I bought this super nice grey cape but I'm not sure what color to match it with. Is it optional to match grey with another "cold" color? (I refuse to combine with black, just so you know) ^^

If you have any tips, please share :)

Maybe pale pink or pale yellow would go with it? Depending on what kind of grey it is. If you wanted a cold colour then maybe pale blue? I'm not sure, it's a hard question!

Yellow! 8)
I've always thought that grey and yellow looked so awesome together <3
But other than that, I think almost every color looks fine with grey.

vinröd perhaps?? :3 (don't know the colours name in english ^^'' )

pastel pink or purple would work

 Pretty much anything with a hint of grey (if the cape is light grey) would work - so any pastel color, such as this, this, and this (the first color is light grey and the second is the actual color).

Grey goes with everything! Muted colors are especially nice. My favorite color with grey is light pink. If not black, white would also look great!

pink looks good with gray..
and also yellow ^_^
try it :)

I think any color could go with gray, depends on what image you're going for. Look through your stuff, patch it around and see what you like. Imo, I like purple with gray, black with gray (in my opinion), gray/pink, blue.. many possibilities, you have to choose your style/preference.

I think any color would look good together with grey, but I'd go for blue if it was me. I'm a blue freak

Grey looks nice with lots of colors....I personally like grey with white or grey with blue myself....though it would also look pretty cute with purple.