Below you will find the tools you need to create a multicultural skin tone on your images.
This isn't a dark African tone, its kind of a mixed tone which is quite pretty.
And by the way I'm quite new at coloring non-white images so bear with me as I have not perfected it, this is just what I do and if it is helpful to you, so much the better!
These are the pencils I have used: (Prismacolors)
I start off by laying down a soft layer of Rosy Beige
On top of that, I add Jasmine (below)
Then Peach (below)
And Goldenrod (below)
Then a layer of Blush Pink, applying a little heavier around the areas I want shaded (the hairline, neck etc)
Then the same thing with Pink (below)
And now for another layer of Goldenrod. (particularly in your shadows)
Then go in with the Rosy Beige and pretty much give it an all over. Rosy Beige is good for melding the colors together and keeping the tone.
Now for a bit of Burnt Ochre just in the shadows. Don't overdo it.
And Dark Brown (VERY lightly in shadows)
And some Clay Rose
It's at this point that I see that I would like a bit of blush in her cheeks so I go back in with the Pink and lightly work some pink pigment into her cheeks. It's not too much cos lets face it, darker skin tones don't blush like us whities. :-)
And I finsh it off with a bit of Mineral Orange to tone it all out.
I could go in with more of the darker pencils we used to make a darker skin tone but I'm liking this just fine so I'll stop here. :-)