1. Cryoazurian (#a7cbd9): 0-90 Kelvin. No tropospheric clouds and only faint hazes. Dull blue in color, occasionally with hints of cyan from hydrocarbon hazes in the upper atmosphere. 2. Frigidian (#dae2f2): 5-20 Kelvin. Extremely cold hydrogen clouds only capable of forming on worlds that are far from any stars. White clouds with hints of grey and blue. 3. Neonean (#f2dfe8): 15-35 Kelvin. Very cold neon clouds. 4. Borean (#f2daf1, #e5daf2, #f8cbbd): 35-60 Kelvin. Clouds of nitrogen, carbon monoxide, or more rarely oxygen. Various colors, typically pale pink or purple, although reds, oranges, or browns may occur from discoloration from organic hazes. 5. Methanean (#cfe9f4): 60-90 Kelvin. Clouds of methane, ethane, and occasionally argon. Usually accompanied by moderate amounts of organic haze. Light blue to turquoise in color, but can become more of a dull green or even bronze from extensive haze. 6. Mesoazurian (#81d4c4): 90-550 Kelvin. Uncommon clarified atmospheres. Usually teal or green in color as a result of heavy discoloring by organic and sulfur hazes.

Tholian (Give hex colors for tholian gas giants): 60-550 Kelvin. Various organic hazes that obstruct the surface and any clouds below. Various colors, but usually pale yellow, orange or brown.