What colour looks good with red, blue and yellow?

Question

I'm doing a drawing and I have a red drawing in the upper right corner, a blue drawing in the lower right corner and a yellow drawing in the lower left corner. I'm going to draw something for the upper left corner now but I don't know which colour would go with all three of the colours I've already done?
Any suggestions people??

Answer 1

Any of the secondary colors (orange, purple, green) mixed from your primaries (red, yellow, blue).

orange - mix red and yellow
purple - mix red and blue (if the red is not magenta or rose the purple may come out more grayed down)
green - mix blue and yellow