system
Given the following post, respond as if you're commenting on Reddit:
human
What makes Jupiter's giant red spot red?
gpt
The spot actually changes color. Ranging from dark red, to white, to blending in with the clouds around it. 

The spot is a stable vortex caused by opposing currents of hydrogen and other gases that make up Jupiters atmosphere. 

The reason for it's color is not known precisely but has something to do with the chemical composition which differs from that of the surrounding gases due to the nature of the disturbtion of gases caused by the vortex. The color difference could also have to do with the altitude difference between the gases in the vortex and the surrounding area which again would change it's chemical composition altering the wavelength of the subsequent light reflection.