normalize
Converts individual {r, g, b, a} channel values to a single integer representation of the color as 0xAARRGGBB.
Return
integer representation of the color as 0xAARRGGBB
Parameters
r
red channel value, 0, 255
g
green channel value, 0, 255
b
blue channel value, 0, 255
a
alpha channel value, 0, 1