Here's three more singer/musicians with 'skin color' stage names or nicknames:

Brownie McGhee (Walter McGhee; November 30, 1915 - February 16, 1996) was a folk-blues singer and guitarist, best known for his collaborations with the harmonica player Sonny Terry.
http://en.wikipedia.org/wiki/Brownie_McGhee

Hip-Hop artist: Redman {Reggie Noble} is a another African American whose "redbone" complexion is referenced by his stage name.
click http://www6.defjam.com/site/artist_home.php?artist_id=192 for a photo

Also, I read a biography of R&B singer/composer Smokey Robinson which said that as a child, his uncle playfully gave him the nickname "Smokey" because he was so light skinned. A Black person whose nickname is "Smokey" usually would be very dark skinned {because he or she was burnt by the sun}. An example of this
non-pejorative custom of conferring opposite nicknames would be calling a really tall person "Tiny".

For a photo and information on Smokey Robinson {Williarn Robinson, b. 19th February 1940} click http://www.soulwalking.co.uk/Smokey%20Robinson.html