I needed something that would allow me to dye mineral oil without having the color separate out, and this works very well.  Don't make the mistake I made the first time - I used too much, and that results in a cloudy color.  Just start with a drop, and take it from there.  With the primary colors, you can make almost any other color you need.  It comes with Blue, Red, Orange & Yellow - but you can make Green and Purple as well by mixing.