It’s time to get me up to speed with modern CSS. There’s so much new in CSS that I know too little about. To change that I’ve started #100DaysOfMoreOrLessModernCSS. Why more or less modern CSS? Because some topics will be about cutting-edge features, while other stuff has been around for quite a while already, but I just have little to no experience with it.
Like the lab() color function,
hwb() is one of the more recent methods for defining colors in CSS. Just like
hsl() it uses colors from the sRGB color space. HWB, which stands for hue-whiteness-blackness, describes colors with a starting hue, then a degree of whiteness and blackness to mix into that base hue.
The function takes 3 space-separated values.
background-color: hwb(234deg 30% 34%);
h - hue
The first value defines the hue. It's an angle of the color circle given in
turns. The value can also be a unitless number, which defaults to
The color circle starts and ends with red (red=0deg=360deg), green is at 120deg and blue at 240deg.
background-color: hwb(0 0% 0%);
background-color: hwb(206 0% 0%);
w – whiteness
The second parameter specifies the amount of white to mix in, as a percentage from 0% (no whiteness) to 100% (full whiteness).
background-color: hwb(206 68% 0%);
b - blackness
The third parameter specifies the amount of black to mix in, as a percentage from 0% (no blackness) to 100% (full blackness).
background-color: hwb(206 0% 42%);
You can also add a fourth parameter for the alpha value.
background-color: hwb(206 0% 42% / 0.5);
See on CodePen.
- hwb() – a color notation for humans?
- hwb() on caniuse
- A Guide To Modern CSS Colors With RGB, HSL, HWB, LAB And LCH
- hwb() on MDN
- hwb() playground
Do you want to learn even more awesome CSS?
I'm running a workshop with my friends at Smashing Magazine in which I introduce you to the most useful modern features in CSS and show how you can implement them today in your code base to improve scalability, maintainability, and productivity.
Learn more about the workshop!