Tap a brand to set the highlighted slot — it advances to the other automatically.
Gels are not physically identical between brands. Every code shown here is the nearest visual equivalent — close enough to swap on a plan, but two "Full CTB" sheets from different makers will read a touch differently on a wall. For colour-critical work, confirm against a real swatch book.
Compiled from the makers' own published cross-reference / swap charts — Rosco's official LEE↔Rosco and GAM↔Roscolux tables, the GamColor and Apollo catalogues, and the shared European numbering that LEE, E-Colour+, Chris James and Cotech hold in common.