nonpremultipled index=0, red=71, green=112, blue=76 index=1, red=51, green=133, blue=188 index=2, red=211, green=139, blue=29 index=3, red=67, green=152, blue=58 index=4, red=43, green=132, blue=19......blue=76, alpha=0 index=1, red=51, green=133, blue=188, alpha=79 index=2...blue=29, alpha=20 index=3, red=67, green=152, blue=58, alpha=254 index=4...