Linear Gradient (Top → Bottom)
Linear Gradient (Left → Right)
Linear Gradient (with Even Stops)
Linear Gradient (with Specified Arbitrary Stops)
Radial Gradient (Centered, Full Size)
Radial Gradient (Positioned, Sized)
Warning: Not Consistent Among Browsers
Shape keywords: circle, ellipse
Size keywords: closest-side, closest-corner, farthest-side, farthest-corner, contain, cover