Every painting you see in my gallery was painted using the three primary colors (red, yellow, blue) plus white. I prefer to mix all other colors you see, including "black". My darkest values are always a variation of purple. As a personal preference, I don't use black in my paintings because the saturation is too lifeless. I can get more depth and life from a dark purple than black any day.
Enjoy my Gallery! and don't forget to contact me for your own commissioned artwork!