When you're looking to select a color palette for your website, go to http://colorschemedesigner.com/. On their site they have a great interactive color selector. You can move the base color around and they'll generate palettes for you based on mono-color schemes, triads, complementary colors, tetrads, analogs, and more. Once you select a palette you can then see sample websites that make use of the palette to get a feel for how it will look.