Luminance


## perceived brightness
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fa159a399-7a06-4c93-be08-68f63692d86f%2FUntitled.png?table=block&id=286998ca-11f2-425d-a1ea-b826879ab6d1&cache=v2)





> [https://codepen.io/web-dot-dev/pen/poZgXxy](https://codepen.io/web-dot-dev/pen/poZgXxy)






