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
免费在线LOGO设计和配色网站
Curated gradients for designers and developers
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
Copy Paste Color Pallette from Flat UI Theme
