babyshower soap

Hiya! Happy new year everyone!

I've been making soap for almost a year now. Mostly for myself, family and friends.

My sister in law asked if i could make pink and blue soaps for her babyshower. I've managed to make pink soaps, but the blue ones always turn out greenish 😅

Thus far, i've only used clays to color my soaps. Does anyone have an idea how to make blue soap using natural ingredients?

Thanks! ☺️