Due color
Dominant opal
Pigeon color: the dominant opal factor, which bleaches the bar or check area so the wing shield shows pale, whitish bars or checks (AGHA: 'Whitish bar and checkering can occur'); mostly on blue, also on ash red and brown (NPA, American Show Racer and Giant Homer standards).
5 Due breeds list Dominant opal. It is in a club standard for 3 breeds.
Breeds whose standards accept Dominant opal
| Breed | NPA |
|---|---|
| Giant Homer | Standard (“DOMINANT OPAL”) |
| Orientalsk roller | Standard (“Opal”) |
| Show Racer | Standard (“Dominant Opal”) |
| Brevdue | Alternativ (“AOC (brown, khaki, opal, indigo, etc.)”) |
| Gammeltysk ugle | Alternativ (“AOC: Any colors not listed above, i.e. Bar less, Opal, Andalusian, etc.”) |