See inside. Only @JoetheScratchmaker is allowed to remix this. My non-impossible colourblocks: 1. Scarlet: (Red + Vermillion) Coral's sister, friends with Vermillion, and loves Autumn. 2. Maximum Red: (Red + Scarlet) Red's sister, sometimes loses her temper (or "goes feral") 3. Tangerine: (Vermillion + Orange) Loves tangerines. 4. Aureolin: (Maximum Yellow + Yellow) Yellow's friend, a bit shy, usually tells Maximum Yellow to calm down. 5. Maximum Yellow: (Yellow + Lime): Did I mention that all the maximum colours go feral? 6. Farrow: (Lime + White) Lime's sister. 7. Cano: (Lime + Black) Lime's sister. 8. Chartreuse (Lime + Green) He loves his French drink. 9. Maximum Green: (Green + Aquamarine) More feralness. 10. Ocean Mist: (Cyan + White) Cyan's sister, Loves the snow and studies Ice, she has Ice for any ocassion. 11. Maximum Cyan: (Cyan + Azure) Even more feralness. 12. Maximum Blue: (Blue + Denim) You get the idea. 13. Electric Violet: (Purple + Magenta) Electric means Maximum. 14. Maximum Magenta: (Magenta + Rose) You guessed it, more feralness! 15. Seance Purple: (Magenta + Black) Plum's brother, even darker than Plum. 16. Crimson: (Rose + Black) Crimson's brother. 17. Iron: (Dark Grey + Black) Silver's brother, Silver decided to make him the colour of 4th, 4 is now an important number! Oh! Here's the one for Cheese: (Orange + Amber) Orange's friend, loves cheese. Impossible Colourblocks: 19. Stygian Blue: (Lapis seen against Black) She is kind of shy and is Lapis' (I gave Denim 2 names) sister. 20.
Credit to @JoetheScratchmaker for most of the non-impossible colours.