I think you've answered this before but if I have heterochromia or have two different colored eye contacts in, Avatar of Me is both colors, correct? Mostly asking so the person seeking more colors can really game the system. ;)

Correct. Kate Bozworth’s Avatar of Me is blue and hazel.

CR 702.1c states that "the same is true for" effects apply to each of a keyword's variants separately. 702.11g states that "hexproof from each " is shorthand for one variant of hexproof per possible quality of that characteristic. This means in non-Un games, discarding Breaker of Creation (which has hexproof from each color) to Indominus Rex, Alpha gives five counters and thus draws five cards. How many cards do you draw in an Un game? (In particular, does every eye color count?)

In Un-games, when counting colors, you count the five normal colors plus any color of permanents you have. You have the gold Dragon token from Sword of Dungeons & Dragons, you’re now at six. You also have a brown Avatar of Me, you’re now at seven. You have a pink Teddy bear counter from Gift Shop, you’re now at eight.

In an Acorn game, if I control Leyline of the Guildpact and my brown-eyed opponent controls Avatar of Me, are all my nonland permanents brown in addition to the five regular colours?

Yep.

Can Artificial Evolution target text that is technically a creature type but is used in a different context? I thought so, as long as it's not rules text or reminder text. I.E. can I use Artificial Evolution to change the text on Avatar of Me "Avatar of Me's color is the color of your ouphes?" And if so, would that now mean that if I had two Brown Ouphes in play, Avatar of Me would be Brown? And if I had a Faeburrow Elder in play and tap it, would I be "forced" to add one Brown Mana?

It can only change words being used in the context of being a creature type.

If avatar of me is the color of the controller’s eyes, doesn’t that mean it’s basically always going to be at least white and black, since almost everyone has pupils and sclera?

It means the iris if the eye, what people think if as eye color.

Avatar of Me's rules text says it's the color of your eyes, but red and white aren't human eye colors. In this case, do *really* light blue eyes count as white and do brown ones count as red?

Avatar of Me lets creatures be colors other than the five Magic colors.

Hypothetically, if someone with more than 2 eyes was playing Avatar of Me, could it be more than 2 colors?

Sure. You should see when Beholders play it. : )

Can Rarity grant protection from hazel, brown, gray, and Amber since those are possible colors on Avatar of Me?

Sure, but no other cards are those colors.

In an Un-game, how many colours is Transguild Courier? 9? (WUBRG + Pink, Gold, Brown, and Hazel?)

In silver border, the five main colors (white, blue, black, red, and green) always exist. Other colors exist when a card makes them exist. If you have a pink teddy bear, pink exists. Because of Avatar of Me and the ruling that you can wear contact lenses, all colors potentially exist, so things that care about color don’t care about potential, but what currently exists - with the caveat that the main five always exist.

Hi Mark, Unrules question, if I cast an Avatar of Me and I have brown eyes would it be an artifact creature?

No.