WebGradients is a free collection of 180 linear gradients that you can use as content backdrops in any part of your website.
Beautiful Color Palettes
The daily color digest
Create color schemes with the color wheel or browse thousands of color combinations from the Color community.
Color Claim was created in 2012 by Tobias van Schneider with the goal to collect & combine unique colors for my future projects.
Best Flat Colors For UI Design