What do call this?

I don't want a solid dyed hair color, I want it to be two colors, my natural black hair color and a dyed color that doesnt fill in all the spaces like the picture below.



Like that, the colors are nicely blend in without going all red or all black or whatever color. How would I tell a barber I want it to be dyed this way and not just one solid color?

Um, hi, if you're gonna take my picture as your example, why not just ask me?

My hair has two layers. The underneath is my natural color, a very very dark brown. The top layer (basically, using your fingers to part your hair, start at the top of your ears and go straight back so you have a ponytail on top) is Special Effects Blood Red over hair bleached to about level 7. You don't have to bleach that light, but I was previously going for dark blonde.

I find this to be easier to maintain than highlights (not that that's my color anymore).

There are two layers. As I said before, part your hair horizontally from ear to ear. You now have two sections: top layer and bottom layer. Make each one a different color, and as your hair moves, you get glimpses of the underneath color. Then, when your roots grow out, you're not left with trying to fix the top of each streak as you would in color chunking, You just do all the roots on the top of your head at once.

Sumo,

Stick your thumbs on top of your ears, fingers pointing up. Now slide your thumbs around your head, under your hair, and when your thumbs meet at the back of your head, lift up that hair... that's the top layer, what's left is the bottom layer, that's what she meant.