Describe chromochemical (color-chemistry) classification of gas giant: 1. Neptunian (Cryo-Azurian): Dull blue in color. Example is Neptune. 2. Frigidic: Extremely cold hydrogen clouds. White clouds with hints of grey and blue. 3. Lilacean: Clouds of nitrogen, carbon monoxide, or more rarely oxygen. 4. Methanic: Presence of methane, ethane, argon. Example is Uranus. 5. Springian (Meso-Azurian): Presence of organic and sulfur hazes. Dull spring green in color. 6. Tholinic 7. Sulfuric: Sulfur-enriched ammonia clouds. Yellowish color. 8. Jovian: Presence of ammonia clouds. Jovian brown, Saturnian yellow, beige in color. Example are Jupiter and Saturn. 8. Leukean: Presence of water clouds. 10. Venusian: Presence of clouds of carbon dioxide and sulfuric acid. 11. Navyean (Pyro-Azurian): Cloudless. 12. Alkalic: Dark brown color. 13. Fuliginic: Example is TrES-2b. 14. Silicatic: Gray in color. 15. Corundic: Orange and red in color.