Definition and Usage
The <gradient> CSS data type denotes a CSS <image> made of a progressive transition between two or more colors. A CSS gradient is not a CSS <color> but an image with no intrinsic dimensions; that is, it has no natural or preferred size, nor ratio. Its concrete size will match the one of the element it applies to.
There are several types of colors gradients:
linear gradients, generated by the
linear-gradient()function, where the color smoothly fades along an imaginary line.
background-image: linear-gradient(to right, red, orange, yellow, green, blue, indigo, violet);
radial gradients, generated by the
radial-gradient()function. The more away from an origin a point is, the more far from the original color it is.
background: radial-gradient(red, yellow, rgb(30, 144, 255));
repeating gradients, which are fixed sized linear or radial gradients repeated as much as needed to fill the entire box.
background: repeating-linear-gradient(top left -45deg, red, red 5px, white 5px, white 10px);
Like with any case involving interpolation of colors, gradients are calculated in the alpha-premultiplied color space. This prevents unexpected shades of grey to appear when both the color and the opacity are varying.
Each different gradient type has a different compatibility matrix. Please consult each individual article.