The Big Top

• WWizards of the Coast2022-10-07
  Official Ruling
  There’s wide latitude for what counts as the five colors of mana. Any shade of red qualifies as red, and so on. Some dark shades of purple can likely pass for black mana, and some light shades of yellow can pass for white. We do those on cards sometimes.
• WWizards of the Coast2022-10-07
  Official Ruling
  You can add any color of mana in Un- games, though, so if you really want turquoise mana, go for it.
• WWizards of the Coast2022-10-07
  Official Ruling
  If you’re wearing layers, you can count any garment that other players can see.

Rulings via Scryfall