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Table 1.

Color and morphological measurements of an amelanotic Steller's jay feather, a normal blue Steller's jay feather and a white chicken feather

Chroma (%)
Thickness (nm)
FeatherHue (nm)Predicted hue (nm)Brightness (%)UVBlueSpongy layerCortex
Blue 413 441 8.08 27.20 33.28 4474.41 8383.77 
Amelanotic 514 493 37.93 20.37 30.37 6313.93 12052.33 
White n/a n/a 32.94 15.92 28.81 n/a 7386.47 
Chroma (%)
Thickness (nm)
FeatherHue (nm)Predicted hue (nm)Brightness (%)UVBlueSpongy layerCortex
Blue 413 441 8.08 27.20 33.28 4474.41 8383.77 
Amelanotic 514 493 37.93 20.37 30.37 6313.93 12052.33 
White n/a n/a 32.94 15.92 28.81 n/a 7386.47 
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