What color is the resulting dried residue of blood likely to present as after rapid desiccation in space?

Answer

Dark/Blackish-Red

The residue left after vaporization consists of concentrated solids like red blood cells and plasma proteins; this concentrated, deoxygenated form presents as a very dark, almost blackish-red.

What color is the resulting dried residue of blood likely to present as after rapid desiccation in space?

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