When choosing paint colors, I purposely choose transparent colors.
Transparent colors allow the white of the canvas or paper to show thru the paint.
The colors appear more brilliant because the white of the paper or canvas illuminate the colors.
single pigment colors
When I am choosing paint colors I find out how many pigments are used to manufacture the paint.
Paints that are made with only one pigment mix well with other colors. They produce clean, clear color mixtures.
All of the Alkyd paints I use are single pigment paints.
One exception is the convenience color I use, Sap Green.
The cadmium colors are not on my palettes as a health precaution.
Cadmium colors are beautiful, brilliant colors, but they are associated with a health hazard.
The same goes for Cobalt Blue.
Ultramarine Blue together with Thalo Blue give a nice range of blues.