Question

The hair, color, and skin of a reconstructed fossil animal is usually based on:

Answer 1

The hair, color, and skin of a reconstructed fossil animal is usually based on "inference".

Fossils typically just leave us data about the harder parts of a creature, for example, bones and shells. At times, in any case, delicate tissues, for example, quills, skin or hair are abandoned. 
In any case, in 2008 it was recommended that these little microbes like structures were in actuality safeguarded melanosomes, the extraordinary sub-units of a cell that convey the shade melanin. This is the essential wellspring of color for plumes, hair and skin over the set of all animals.