This pin is obtained by collecting colors of all kinds: clothing, furniture, eye, lip and hair colors. This pin was the only pin that took into account items (in this case colors) already purchased from the beginning.
This is the amount you need:
After reaching the 5th level, you can level this pin again with the same number. After that, the color no longer changes, but a number appears on the pin. This shows other users how many times you have reached the last level.