After looking at their color choices, I figured I’d could find a baby pic of each.
White will of course be totally yellow as a baby, black will be solid black. If there is any yellow on the breast of a black duckling, the yellow will turn white and the duck will be black bibbed. Same for blue.
Magpie, I believe, should be a specific pattern of black and white, if the pattern doesn’t match the official pattern, it’s just blue pied or black pied, not necessarily magpie. Hope that makes sense. I don’t think I have any that fit the official description of Magpie.
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Grey will be black with yellow “diamonds” on its back, and prominent eye stripes. Blue fawn is marked the same with the yellow diamonds, but the main down is blue.
This is a Grey, Blue Fawn, and Nutmeg (grey with chocolate genes)
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Pastel looks really light yellow, but it’s not a vibrant yellow. It’s more dull, with a hint of blue-ish coloring. I can’t seem to find a pic of Pastel or Snowy at the moment. I’ll keep looking.
Penciled should look like a mix of grey/blue with eye stripes, but have some scattered yellow throughout. I don’t have any penciled personally.