Here is what I found:
Is there a black rose?
No true black roses exist. Rose sold as black ones are really a dark maroon. These roses tend to get their petals badly scorched by the sun.
Hi! I am trying to find a place that sell's black roses and was woundering if you can help.
The search for a black rose is similar to the search for a blue rose - neither exists but everyone keeps wishing. There are some dark red roses that begin to approach a black color. One of the darkest is a minature called Black Jade. A search of photographs in nursery catalogs will find other dark red roses that have been favored at different times.
Many look forward to blue or black roses. The pigment for the color blue does not exist in roses, and the scientists say there will never be a blue rose bred naturally. However, in Australia, through genetic engineering - they are taking the blue pigment from a different flower species and trying to implant that in a rose.
As for black, there are dark red roses today that are very close to black, especially in the bud and in cool weather. The problem with this color is that a black rose would burn under a hot sun as would a person who wears a black shirt.