blue function

The blue function extracts the blue component of a color and returns it. Colors contain four components: red, green, blue, and alpha. To construct a color from the individual components, use the rgb or rgba functions.

Examples:

blue(rgb(1, 0.2, 0))    ; 0.0
blue(rgb(0.5, 1, 0.3))  ; 0.3
blue(hsl(4, 1, 0.5))    ; 1.0

See Also
red function
green function
hue function
alpha function
Writing direct coloring algorithms