Did you know that only 10 percent of the world is naturally blonde? It's a color that demands attention because, in the grand scheme of things, it's extremely rare. And of course, anything rare deserves the utmost attention.
While it's said all too often that blondes have more fun, what can be proven is that platinum blondes have more color maintenance. "You need to be consistent with touchups," Umberto said. He suggests coloring your hair every four weeks. Try a toning shampoo, like Clairol Shimmer Lights Original Conditioning Shampoo ($8.49; sallybeauty.com), which tones down brassiness by depositing a slight cast of violet on strands. Or, "avoid the absorption of rust from old pipes or mineral deposits in your shower water with a shower filter, like T3 Source Showerhead." ($130; sephora.com)