Some suffer the holiday blues. We say enjoy them. Blues are popping up where you’d least expect, like Plaque HD’s Professional Plaque-Identifying Toothpaste, which turns plaque on teeth blue and vanishes when brushed off, for a whiter holiday smile; $21 at

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Another surprising teeth brightener — Apa Blue Lip Shine, a clear gloss with subtle, reflective blue crystals (to make teeth look whiter) and infused with peppermint oil (for fresher breath). Wear it alone or layer over your favorite lip color; $25 at

Don’t like your selfies? Try Perfect365, a free digital makeover app that retouches photos, offering different packages for various looks (the new SmokyDay package, $1.99, adds blue and brown digital shadow, making brown eyes pop in photos); at iTunes and

OPI Nail Lacquer’s new Starlight Collection offers 18 limited-edition sparkly shades just in time for the holidays. We love “Give Me Space” — a great sentiment — and a deep midnight blue. Dramatic, but well short of goth; $9.50