The Gel Swatch Library by Gel Services, Inc., lets lighting production personnel browse, search, and compare more than 1,600 gel color filters made by the most popular manufacturers:- Apollo- GAM- Lee- RoscoThe Gel Swatch Library lets you:- Search for gels by name or number- Sort gels by number or how theyre arranged in the physical swatchbook (forwards or backwards in the swatch book)- Compare similar and complementary colors- Examine each colors detailed Spectral Energy Distribution graphs by turning the iPhone or iPod touch sideways- View CMY/RGB percentages or DMX values for any color- See the last 21 colors visited with the Recently Viewed Colors list- Send comments directly to the developer at Gel Services with the Feedback buttonThe Gel Swatch Library is perfect for:- Theatres- Churches- Cruise ships- Corporate events- Educational theater programs- Nightclubs- Theatrical dealers- And many more areas of the lighting world