Thanks so much
You can add Rit dye. Or you can buy smaller sample size jars of chalk paint in whatever color you are trying to achieve and try that. I am thinking you want to add color to white chalk paint.
Yes I would also add color from other smaller pots of paint to tint your current color.
How to use white wax on wood furniture
How can I use white wax on wood furniture to change look.
I would think you could use powdered tempra paint. It’s chalky.
Do you know how to change the saturation or chroma? Opposite side of the Color Wheel.