Also, if you're looking for new blush colors the best list of colors for your complexion I found recommends the following...
Fair skin: Giorgio Armani in No. 3
Fair to Med: Nars in Orgasm
Med to Dark: Nars in Orgasm
Dark: Nars in Exhibit A
Also, try a cream blush for longer lasting, more natural color that won't fade. Nars has great ones in a cream blush stick that are less messy than using your fingers. But I don't mind the mess for the results so I use cream blushes from various brands. As always, Sephora workers are a wealth of wisdom. Don't feel bad asking lots of questions - they'd be bored without us nosey people anyway.
One more tip: if you drop your powder blush don't cry...get vaseline. You can make lipgloss out of your mistake. If it looks great on your cheeks it will look great on your lips as well. Just something to keep in mind to save you after an oops moment.