Both Rosco E-Colour and LEE gel filters use the European gel numbering system so E-Colour 506 Marlene is equivalent to LEE 506 Marlene.
 
E-Colour+ is Rosco's comprehensive system of colour filters for theatre, live-events, and film and television production. E-Colour+ includes a complete range of filters and materials for colour correction, colour effects, diffusion and reflection. E-Colour+ is manufactured with the latest dye formulations and bonding technology to assure the highest levels of reliability and performance.