Don't you think the wreath might look a bit lonely - just three little blobs of blue? If it were me, I would consider a brown/tan for the strap, which would frame the crest. Certainly something to match your own skintone. The buckle, tang and strap end would be in brass/gold.

It might also be worthwhile considering a drop-shadow for the two crest elements. The very thinest of a red line (one pixel wide), on the lower and right edges might give the two a lift. If you look in the graphic the cross crosslet fitchy already has a minute drop-shadow.

Regards

Chas