color-rgb-to-hsvcolor-rgb-to-hsv is a compiled Lisp function in `
color.el'. (color-rgb-to-hsv RED GREEN BLUE) Convert RGB color components to HSV. RED, GREEN, and BLUE should each be numbers between 0.0 and 1.0, inclusive. Return a list (HUE SATURATION VALUE), where HUE is in radians and both SATURATION and VALUE are between 0.0 and 1.0, inclusive.