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HSLA editor

This week's widget is a simple HSLA color slider

See the Pen HSLA editor by Tristan White (@triss90) on CodePen.

HSLA colors in CSS can be used to define color properties for various elements in your web design. HSLA stands for Hue, Saturation, Lightness, and Alpha.

Here's a breakdown of how each component of HSLA is used in CSS:

  • Hue (H): This is the first parameter and represents the color itself. It's a degree on the color wheel; 0 (or 360) is red, 120 is green, and 240 is blue.
  • Saturation (S): This is the second parameter and represents the amount of color, or the intensity. It's a percentage; 100% is full color, and 0% is a shade of grey.
  • Lightness (L): This is the third parameter and represents the amount of white or black in the color. It's also a percentage; 0% lightness is black, 100% lightness is white, and 50% lightness is neither added white nor black.
  • Alpha (A): This is the fourth parameter and represents the opacity of the color. An alpha value of 1 is completely opaque, and an alpha value of 0 is completely transparent.

Here's how you can define HSLA color in CSS:

element {
    background-color: hsla(120, 100%, 50%, 0.3);

In the above example, the background-color of the element is set to a color with hue 120 (green), 100% saturation (full color), 50% lightness (neither light nor dark), and 0.3 alpha (somewhat transparent).