- rgb-over color_1 color ...procedure
- rgb8-over color_1 color ...procedure
- hsl-over color_1 color ...procedure
Composite color_1 over zero or more colors, similar to "normal" layer blend mode in image editing software. Same as rgb-under etc. except the order is reversed: the first color is on top and each later color is lower down.
The result type and color space used depends on the procedure. The result's alpha will be based on the inputs.