Paint code Help

They aren't single stage but Dupont's Hot Hues line has some bright colors. The clear coat paints will have more brilliance than single stage will. If you want to make your Vitamin C stand out, have it mixed in bc/cc, add a little pearl to the first 2 coats of clear, then follow with 2 more coats of clear. It takes very little pearl to really make a color "pop". You will be amazed at the difference in the brilliance. Clear coat alone will change the appearance of your original color.
One paint job I did that got alot of positive comments was done with a factory GM black cherry color, followed with 2 coats of clear with a touch of white pearl, followed with 2 more coats of straight clear.
Good luck with your choice.
Dallas