Hello good afternoon what is mitochondria

A mitochondrion is a double-membrane-bound organelle found in most eukaryotic organisms. Mitochondria generate most of the cell's supply of adenosine triphosphate, used as a source of chemical energy. They were first discovered by Albert von Kölliker in 1880 in the voluntary muscles of insects.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.