My suggestion is to blend grey with a touch of the metallic blue. Or grey, a little chrome and a touch of blue. Either buy those little Testers bottles to mix and thin if necessary, or spray rattle cans into a cup then mix, and apply with a brush. Or, if you're an airbrush guy (I don't remember who here is) then apply the mixed color with that, obviously.
I was thinking along those lines, but weather was so nice that I gave it a shot of gloss gray (I work full time during the week, so while I take breaks working from home to paint, it is tricky lol).
I really like how it looks!
I chose the gray because this photo makes it look almost gray.
However, along the lines of what you were saying, I actually already also sprayed the same gray paint on a spare spray paint can lid and will test out that Valspar blue stained glass spray as a tint to see how it looks.
Gotta head out for some chores soon, but wish I could do more painting today.