PST Color Selector


What Color do you like?

We change it for you!

Tell your device what to do!

Hex Value

RGB Value

HSL Value

NFP Value

Turn the GPIO on!
Turn the GPIO off!

What's so great about HSL

HSL (Hue, Saturation, Luminosity) allows us to describe meaningful relationships between colors. Give this brown color, hsl(36, 73%, 10%), it's clear that if we desaturate 40 steps and lighten 70 steps we get hsl(36, 33%, 80%), a cream color. Look at that in hex, #2C1D07 to #DDCFBB, or in rgb, rgb(44,29,7) to rgb(221,207,187), and the relationship between colors isn't evident in any meaningful way.

We use Compass and Sass for all of our web design work and the great color functions that allow us to manipulate colors using these relationships. We can use Sass's adjust-color to convert brown to cream like in the example above.

adjust-color(#2C1D07, $saturation: -40%, $lightness: 70%) 
which returns #DDCFBB

Sass converts easily between RGB, HSL, and hex so I can have convenience of HSL color relationships but the browser compatibility of hex color notation. There are other color functions like change-color which lets you set the properties of a color, and scale-color which applies color transformations on a relative scale. These are great, but because they work like HSL, you have to understand how HSL works.


In graphics software I pick colors in HSB (Hue, Saturation, Brightness) because it feels more natural to work with than RGB or CMYK. Now, with CSS3 we can use HSL which is actually quite different than HSB. Without a decent HSL color Selector, it's difficult to understand.

How to think in HSL

Pick a Hue from 0 to 360 and with saturation at 100 and luminosity at 50 and you'll have the purest form of that color. Reduce the saturation and you move towards gray. Increasing the luminosity moves you towards white, decreasing it moves you towards black.