Here is the full list of all 41 DYE achievements.
Complete each Red level on HARD mode with ALL Pigments
Gather all Pigments on HARD mode on ALL levels
Collect all Red world Pigments
Collect ALL Pigments
Finish all Red challenge levels on HARD mode
Finish ALL challenge levels on HARD mode
Finish all Red challenge levels
Finish ALL challenge levels
Complete each Green level on HARD mode with ALL Pigments
Collect all Green world Pigments
Finish all Green challenge levels on HARD mode
Finish all Green challenge levels
Defeat the Ice Golem in 100 seconds or less
Kill 2 vultures before the 3rd awakens, finish the fight
Defeat Inferno
Defeat ALL bosses
Defeat Inferno after having 2 skulls active at once
Complete each Blue level on HARD mode with ALL Pigments
Collect all Blue world Pigments
Finish all Blue challenge levels on HARD mode
Finish all Blue challenge levels
Die 1,000 times
Defeat the Slime King
Defeat King Slime without taking shrooms
Defeat the Ice Golem
Collect 200 Pigments
Die 500 times
Float for 10 minutes
Complete each Purple level on HARD mode with ALL Pigments
Collect all Purple world Pigments
Finish all Purple challenge levels on HARD mode
Finish all Purple challenge levels
Get all 5 pigments in under 30 seconds on any NORMAL level
Collect 100 Pigments
Die 100 times
Defeat the Vultures
Float for 1 minute
Get all 5 pigments in under 40 seconds on any HARD level
Gather all pigments on HARD mode for a single level
Die.
Drown in the first level