because indigo is like dark violet so if you add little darkness to violet you will get indigo
The color midway between blue and violet is indigo (indigo blue, the I in "Roy G Biv").
Blue-Violet (Tertiary color)
Indigo- a mix of blue and violet
When you mix purple with blue, you get a shade of indigo. Indigo is a dark blue-violet color that is created by blending these two colors together.
Blue and violet mix to create indigo, which is a deep blue-purple color. Mixing blue and violet together can produce a range of shades between the two colors, depending on the ratio of each color used.
Oh, dude, if you mix indigo and violet, you get a color that's technically called blurple. It's like a mix of blue and purple, but honestly, who really cares about the exact shade when you can just call it blurple and move on with your day, right?
Blue Violet.
Some sort of purple light, perhaps violet or indigo, but maybe not.
blue violet
Blue, and red for the purple then you will want to add a small amount of blue for the indigo shade.
To make Indigo you need 2 & a half thirds of blue and half a third red. Mix these 2 colours together until you get a darkish blue. ---- There you have it... Indigo. ---- To make Violet you need 2 thirds purple & 1 third white. ---- Mix these 2 colours together until you get a light purple. ---- There you have it... Violet. ---- ----
I actually think that indigo is a mix of blue and purple. But mostly purple is what I think. If you want to know then read this or look on the color wheel and see where indigo reaches further into blue or purple.