Solutions

Solution is used by the Clentaminator to create or destroy biomes.

Solution sold by Steampunker NPC depends on the biome she's in:
 * Green Solution when in pure, neither Corruption/Crimson nor Hallow, biome
 * Purple Solution during a Blood Moon
 * Red Solution during a Blood Moon
 * Blue Solution when in Hallow

Additionally, the Truffle sells a Dark Blue Solution which can turn the Jungle into Mushroom biome.