While judging colorbred, I like to show pictures to illustrate mosiac and striation patterns. The National Colorbred Association uses the Belgium COM standard.
Very good illustration of Mosaic Patterns on the cock and hen. Note the wing butts not the wings are colored and the proper mask on the cock. The hen's eye mark extends back from her eye and not forward toward the beak.
Comparison of striation on the undiluted black and brown (regardless of ground color, such as red/black - bronze) pictured on the left to the dilute such as agate in the black series and isabel in the brown series.