- Grey (American Grey Fade) and green (Limelight, Forest Wood) allow the eyes to perceive color in its truest form
- Brown (Chestnut Fade) provides contrast and minimizes eyestrain
- Yellow (Mellow Yellow) defines and sharpens objects
- Amber allows distant objects to appear more distinctly, especially in snow or haze
- Vermillion (Big Apple Fade, Cabernet) provides color perception and contrast in low light
- Blue (Bel Air Blue, Celebrity Blue) adds calm and serenity to surroundings