Hacker News
- The Geometry of Color Perception https://www.handprint.com/HP/WCL/color2.html 43 comments
- Color harmony and color design http://www.handprint.com/HP/WCL/tech13.html 5 comments
- Handprint : color vision - an extensive online reference about color. http://www.handprint.com/LS/CVS/color.html 3 comments