What is the percent of red and blue to make violet?

Answer 1

It depends on what particular shade of violet you want. The color known as "violet" in computer lists (used on websites, in the X windowing system, etc.) is usually defined as 50% of the red channel and 100% of the blue channel (if you were mixing paint, this would be 33% red and 67% blue).

Answer 2

To make violet, you would combine red and blue in equal parts, each at 50%. Mixing these in equal ratios will create the color violet.