Get the pixel color at coordinate 100x300
$ pixelcolor --x 100 --y 300
13269033
Get the pixel color at coordinate 100x300 as triplets
$ pixelcolor --x 100 --y 300 --triplets
202 120 41
Get the pixel color at coordinate 100x300 as hexadecimal
$ pixelcolor --x 100 --y 300 --hex
CA7829
Get the pixel color at coordinate 100x300 as uppercase hexadecimal triplets
$ pixelcolor --x 100 --y 300 --triplets --hex --upper
CA 78 29