coolors

uiGradients - Beautiful colored gradients，是以渐变色为主的分享网站，上百种渐变配色方案，可以根据自己的风格搭配，节约了试色时间。

Curated gradients for designers and developers

Khroma is the fastest way to discover, search, and save color combos you'll want to use.

The daily color digest

Best Flat Colors For UI Design

Color Claim was created in 2012 by Tobias van Schneider with the goal to collect & combine unique colors for my future projects.