WebGradients is a free collection of 180 linear gradients that you can use as content backdrops in any part of your website.

根据用户输入的品牌色自动生成系统沿用色，支持暗黑、常规两种状态

Beautiful Color Palettes

Best Flat Colors For UI Design

为网页提供一个更好的调色板

Copy Paste Color Pallette from Flat UI Theme