So on the final trail of the island, you must dodge vines down a path to retrieve a quest item for potion making. After grabbing the item, continue forward just a little bit and you will see a table on your left. Margaret will say for you to check out her fathers work before proceeding. You will make your way back to the wooden man and in front of him is a mixing table. the solution is 10 Yellow, 20 Other Colors. Should stop on 70. Pops after drinking potion.