set
Sets color used when drawing solid fills. The color components range from 0 to 255. The color is unpremultiplied; alpha sets the transparency independent of RGB.
Parameters
a
amount of alpha, from fully transparent (0) to fully opaque (255)
r
amount of red, from no red (0) to full red (255)
g
amount of green, from no green (0) to full green (255)
b
amount of blue, from no blue (0) to full blue (255)