I've been trying to capture an Indian Paint Brush flower image today - very difficult with digital as the colors are orange/red/pink - of course my camera of choice has problems with orange/salmon colors. As it was too windy outside, I set up a studio inside at home with my studio lights and used a black background.
By the time I got the colors in the flower close to the actual subject in Photoshop the background was a sickly gray-black shade. What I am trying to do is to isolate the flower against a black background so that it appears to just float. I used the paint brush tool and got most of the background a lovely rich dark black (piece of cake), but as I got close to the flower petals I noticed under magnification that there are a lot of fringe hairs. So I backed off.
Question: Is there an easy way to select just the gray-black background color and just change it to solid black without losing the details of the fringe hairs on the petals? If so, how is it done?