I'm a color person & like bright, happy colors & soothing, beachy tones:
Blue & White
Blue & Orange - they're opposite each other on the color wheel & look so crisp together!
Blue & Pink (but it has to be the *right* pink)
Blue & Green (but it has to be *right* green)
Green & Pink - again, it has to be the right shades
Lavender & Navy
Lavender & Grey
Grey & White