Originally Posted by Violet CLM

Here's the official changelog from 1.20 to 1.23 inclusive, but it doesn't actually mention the logo. I'm pretty sure the color changed in 1.22, however.

Missing from that list:
1.23x: Added christmas versions of the Lizard, Float Lizard, and Normal Turtle enemies, plus the Bilsy boss
1.24: Added new playable character Lori, added Cat and Pacman Ghost enemies, quadrupled the number of tiles usable in levels and tilesets, changed how powered-up ice works
1.24x: Changed the menu palette and gave it a snow effect