I saw it too, in fact I spent hours trying to understand if the literal paint strokes meant something or if they were just like that. Cause it's set up to be a rainbow, but there's no indigo or violet and also red is just off on it's own, and pink is there even though pink isn't in the rainbow, and it's also off by itself. If you look closely it seems like 8 colors with two different shades of pink (with an odd yellow line across them) and 2 different shades of green and there's 8 characters not including Home. I spent hours upon hours upon hours mulling over every detail on that dumb rock that I cry just thinking about it.
I analyzed every single pixel I possibly could and turned over every single rock until there wasn't a rock left on planet Earth to turn over. I overthought every single tiny little detail I could find only for it to lead to a DEAD END CAUSE IT'S JUST A TRAIL OF BREADCRUMBS PLACED THERE TO SEND ME ON A WILD GOOSE CHASE IN SEARCH OF ANSWERS THAT NEVER EXISTED IN THE FIRST PLACE.