Brightness? - Function Summary

Summary:

Returns the monochrome brightness (0.0 to 1.0) for a color value.

Usage:

brightness? color

Arguments:

color - The color argument. (must be: tuple)

Description:

This function converts an RGB tuple to a black and white brightness value between between 0 and 1.

print brightness? 255.255.255
1.0

print brightness? 0.0.0
0.0

print brightness? 255.0.0
0.27
print brightness? 128.128.128
0.501960784313725