I had an interesting idea posed to me while showing off this app. With oldschool gel swatches, you can easily see what your set looks like with that color on it by just looking through the gel under the stage light.
What Id like to see is a way to add a filter to the camera screen so you can see how the color looks on the set. I know the transmission wont be perfect, but itd at least give the designer an idea of what to expect.
Designer Lady about Gel Swatch Library