If you find that the blue facepaint is still too dark, get the white one as well and you can mix them.
I use the same one you have - Mehron Paradise AQ in Light Blue applied over a thin layer of white to add brightness.
One tip (from my own fails when applying eyeshadow for contours) - use barrier spray between layers of the facepaint BEFORE adding this detailing. If you don't have the spray, translucent powder works too. Also, use a blush brush or wider bristle brush for application of eyeshadow because it's very easy to get streaks, which makes it harder to blend. You definitely don't want to have the paint removed during this step...
Stay away from any liquid makeup or roll on gels. If it's not a powder, this stuff will strip the paint right off (because Mehron is water-based).
Have fun with glitters!