Eye color can be dramatic for evening or understated for daytime. Eyeshadow comes in pencil, cream and powder forms, making it very versatile. You can wear it just on your lids, or make it do double duty by applying a thin line of dark brown, gray or black eyeshadow just above and below your eyelashes in place of eyeliner.
Neutral eyeshadow shades produce a classic look that accentuates your eyes. You can also go with colors that match or complement your eye color (peach highlights blue eyes, while any neutral tone goes well with brown eyes). For a more dramatic look, choose a bright color that "pops" and draws attention to your eyes, or blend several shades together to heighten the effect.
Luckily, eyeshadow often comes in handy "expert coordinated" palettes, in which you'll find three or more colors in one little case. It's a space saver, and it can help you identify the right combination of colors for your look.
Before applying eyeshadow, start with a thin layer of concealer, followed by a powder to smooth out your eyelids. Use a separate brush for each color of eyeshadow you're applying, so the colors don't run into one another.