Web设计师的12个免费在线颜色工具
ColorHexa
https://www.colorhexa.com
Colors.css
http://clrs.cc
ColorPick Eyedropper extension
https://chrome.google.com/webstore/detail/colorpick-eyedropper/ohcpnigalekghcmgcdcenkpelffpdolg?hl=en
Coolors
https://coolors.co
Palettte
https://palettte.app
Material UI Colors
https://materialuicolors.co/
Color Supply
http://colorsupplyyy.com/app/
Color Safe
http://colorsafe.co
Color Hunt
http://www.colorhunt.co
Open Color
https://yeun.github.io/open-color/
HTML Color Codes
http://htmlcolorcodes.com/
Adobe Color CC
https://color.adobe.com/create/color-wheel/
1stwebdesigner的文章：
https://1stwebdesigner.com/web-based-color-tools/