For the most vibrant color, use a clean brush. This way, you won’t run into the risk of old eyeshadow muddying up your current color. Use flat, non-shimmery eyeshadow. Flat eyeshadow is the most opaque, and will give you the brightest color.

Make sure that you are using cosmetic-grade makeup powder. The kind that artists use to mix paints is not safe to use on your eyelashes.

If you have dark lashes and want to use a lighter color, prime your lashes with white mascara. You can also use a spoolie dipped in white, liquid liner instead. [7] X Research source