GOODTAKE Concrete Pigment, Purple Iron Oxide Pigment Powder, Concrete Cement Dye Color Pigment for Pastel Tile Paint Concrete Cement Mortar Grout (Purple, 16 oz)

You need an electric mixer and maybe 2-3 of these per gallon of paint depending on how dark you want it. I used one for 2 gallons of paint and it barely tinted the white paint I put it in. It might have done better if I didnt mix by hand

Doesn’t adhere to project surfaces. Tried different things to see and they are all bad

I liked that this was on sale but the picture (one on left) showed an unusually bright yellow which is another reason I bought it. Come to find out that the picture was false and the actual color is just like all other yellow pigments for sale which is a mustard yellow like the one shown on the right.