1. Cryoazurian|Color: #bbe2f2|Temp (K): 0-90|Composition: n.a|No visible clouds and faint organic hazes.
2. Frigidian|Color: #e8ecff|Temp (K): 5-20|Composition: H2|Extremely cold hydrogen clouds. Very rare.
3. Neonean|Color: #ffd1d1|Temp (K): 15-35|Composition: Ne|Very cold neon clouds. Even interstellar ambient temperature can limit thier formation.
4. Borean|Color: #ffe6e0|Temp (K): 35-60|Composition: N2, O2|Minimal organic hazes. Requires significant nitrogen and/or oxygen enrichments.
5. Methanean|Color: #e6fffd|Temp (K): 60-90|Composition: CH4, Ar|Moderate organic hazes. Can sometimes have argon clouds.
6. Mesoazurian|Color: #347299|Temp (K): 90-550|Composition: n.a|No clouds and minimal organic and organosulfur haze.
7. Tholian|Color: #ebcc96|Temp (K): 60-400|Composition: Organic compounds|Organic hazes dominate over cloud layers.
8. Sulfanian|Color: #fcecb7|Temp (K): 80-180|Composition: H2S, NH3, (NH4)HS|Sulfur enriched ammonian worlds. Moderate organic and organosulfur hazes.
9. Ammonian|Color: #ffe5ce|Temp (K): 80-190|Composition: NH3, NH4HS, (NH4)2S, H2O|Moderate organic hazes. Discolored NH4HS clouds can sometimes be seen at lower levels.
10. Hydronian|Color: #ffffff|Temp (K): 175-350|Composition: H2O|Water clouds with little to no haze.
11. Acidian|Color: #faf7e8|Temp (K): 250-500|Composition: H2SO4, H3PO4, NH4H4PO4, H2O|Dominated by sulfuric and/or phosphoric acid clouds and dense hazes of sulfur aerosols.
12. Pyroazurian|Color: #174073|Temp (K): 550-1300|Composition: n.a|No clouds and faint organosulfur and sulfur aerosols.
13. Sulfolian|Color: #cecda0|Temp (K): 400-800|Composition: Organosulfur and sulfur aerosols|Dense sulfur and organosulfur haze.
14. Silicolean|Color: #998c7e|Temp (K): 550-1000|Composition: Organosilicon oils, fluorosilicones|Worlds with hazes of silicone oils, fluorosilicones, and other organometallic compounds.
15. Chloridian|Color: #a7aa91|Temp (K): 620-850|Composition: CsCl, RbCl, KCl, ZnS|Clouds of alkali chlorides and zinc sulfide. Faint surfur aerosols.
16. Alkalinean|Color: #5e5049|Temp (K): 800-1150|Composition: LiF, Li2S, Na2S, NaCl|Alkali and sulfide dominated clouds. Faint sulfur aerosols may be present.
17. Erythronian|Color: #c28c5d|Temp (K): 1100-1350|Composition: Cr, MnO, MnS|Chromium and manganese cloud species, with minimal haze of titanium oxides.
18. Hyperpyroazurian|Color: #171e73|Temp (K): 1300-2200|Composition: n.a|Hot worlds with no vissible clouds or hazes.
19. Enstatian|Color: #788a8d|Temp (K): 1200-1700|Composition: Fe, FeO, MgO, SiO2|Typically (Mg,Fe)SiO3 [Enstatite-ferrosilite] and (Mg,Fe)2SiO4 [Forsterite-fayalite] clouds. Faint TiO and TiO2 haze.
20. Rutilian|Color: #353232|Temp (K): 1400-2000|Composition: TiO, TiO2, VO2|Dense haze layer of titanium and vanidum oxides.
21. Refractian|Color: #a77360|Temp (K): 1700-2300|Composition: Al2O3, CaO, calcium aluminates, perovskites|No hazes. Gaseous titanium and vanadium oxides may cause a temperature inversion.
22. Carbean|Color: #3f3123|Temp (K): 2000-2900|Composition: TiC, CaC2, VC, VC2, TiN, VN|Moderate carbon haze from dissociation of silicon carbide. Limited to carbon rich worlds.
23. Melanoazurian|Color: #424061|Temp (K): 2200+|Composition: n.a|Ultrahot subset of Hyperpyroazurian gaseous planets.
24. Fuliginian|Color: #1f1820|Temp (K): 2600-3400|Composition: C|Moderate haze of fullerenes and other carbon alotropes, overpowering any clouds present.