WebGradients is a free collection of 180 linear gradients that you can use as content backdrops in any part of your website.
提供渐变色和配色方案，还能从提供的图片中提取主要配色
The daily color digest
一个帮助大家选色、调色，提供色彩搭配参考，调色轮网站。
Khroma is the fastest way to discover, search, and save color combos you'll want to use.
Beautiful Color Palettes
Curated gradients for designers and developers
