One of this season's hottest nail hues may be crisp, clean white, but ultramarine is also becoming the ultimate in stylish. The blue-as-the-sea shade provides a summery lift to any ensemble, and is perfect for patriotic holidays and music festivals alike. In the past month alone, the cool hue has been spotted on stars from Christina Milian (left), Lily Cole (upper right), Emma Stone (lower right), and Whitney Port (not pictured). And whether or not you choose to wear it with trendy blue hair, well, that's up to you.
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