If you haven't played the game yet, you might want to skip 01:02 - 02:04 , as iirc the existence of that character is revealed pretty late in the story.

So, in the prologue, when you're asked to enter your name, you can enter one of these codes to change Turing's color, accompanied by a special voice line. And one code even lets you access a message from a 'secret' character...

Most of these codes are references to either popular culture/other video games or references to 2064 rom itself, but for some of these I can't figure out what they mean. Let me know in the comments if you think you have an idea on what the more obscure ones mean!

The codes (got the list from https://gamefaqs.gamespot.com/pc/170170-2064-read-only-memories/cheats):

BabyBluePX [SPOILER] Halloween Utilibot Fairlight BlueDevil BlueBomber Familink Retro GammaOmega TekharthaZ Aperture XJZoni Dekker TOMCAT Badmilk Forde JessMeas Clptrp Chozodia GizoidE OmnicWar BeeBeeAte Grace LexiRivers Gnirut Hassy Sepia ArtooDetoo Threepio Turing (resets Turing's colors)