I just mix bright blue-red gloss with clear gloss.
Take the applicator from the red one, and dunk it into the clear one and wave it around to mix. Do that a few times and test, do it some more if you need to until you get just the right amount of color.
If you want it to be less "glossy," blot it.
Or if you are stuck on it being a stick, try Burt's Bees in Ruby or Rose.
-Great idea! I like that mixing the glosses - I think I have one of each with which to try your method.