Your red cabbage indicator should be dark blue in color. The color of the cabbage indicator will change to red or pink if the solution is an acid and it will change to green or yellow if it is a base.

Making natural dyes for Easter eggs is as simple as getting your hands on some beets, red cabbage, turmeric, or onion skins. Like most people, I grew up on Paas eggs, glowing with chemical dyes ...

Simmer red cabbage, then add baking soda to the simmered water. The red water turns the food color blue — a common hack for dyeing eggs. (Vinegar will maintain the cooking water’s magenta color.) ...

Yellow Dye. Heat 1 quart water, 1 tablespoon vinegar, and 1 tablespoon salt in a saucepan. Add 6 tablespoon ground turmeric and stir well. Simmer for just a few minutes until the turmeric dissolves.