black
a dark violet/purple/lila color
brown
blue + red = purple (aka violet)
purple.
Blue-Violet (Tertiary color)
blue + red = purple (aka violet)
brown probably
Combine blue and pink, or blue and red and white to get violet
The short answer is: Mixing blue and orange makes a great brown. Mix red and green and get a grey brown. Mix violet and yellow and it makes lighter brown. For a really warm brown i mix orange and violet. You have to experiment a little using different amounts until you get the colour you want.
The color midway between blue and violet is indigo (indigo blue, the I in "Roy G Biv").
violet
Indigo- a mix of blue and violet