hsla() CSS Function
The hsla() CSS function is used to set a color value in CSS. The hsla() function takes four values, they are: hue, saturation, lightness and alpha transparency.
hsl() = hsl( <hue>, <saturation>, <lightness>, <alpha>)
- huerepresents an angle of the color circle. You can specify the value as an angle in degrees (e.g. 180deg) or simply as a number (e.g. 180). For example, blue is at 240 degrees, so it could be written as either 240deg or 240. By definition, red=0°=360°, with the other colors spread around the circle, so green=120°, blue=240°, etc.
- saturationsaturation is expressed as a percentage. It represents the amount of saturation in the color. For example, 100% is fully saturated (more colorful and intense), while 0 is a fully-unsaturated gray.
- lightnesslightness is also expressed as a percentage. It represents the amount of light in the color. For lightness, 50% is the "normal" setting, while 100% is white and 0% is black.
- alphadetermines how transparent the color is. A value of 1 is fully opaque, while a value of 0 is fully transparent. A value of 0.5 is semi-transparent.
<div class='hsla'>This is an example of the hsla() function.</div>
background-color: hsla(240, 100%, 50%, 0.5);
border: 2px solid red;
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