Buff is a color that has a few mysterious ingredients. In the calculator I added dun factor to explain the absence of black feathers in the tail and flights.
Not all buffs do have that factor. See the remark-hyperlink in the calculator.
Furthermore some buffs have Db next to Co. This Db may...
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don't believe everything that calculator tells you. I have reason to believe it's wrong in some of the crosses I tried and really did but got way different results.
What's wrong then?
I have heard this kind of comment more often but those people either did not come forward with...