Colour management issues embrace all the processes and technologies from design through product development, production, cataloguing, advertising, marketing, packaging and display right to the final consumer. The world's largest retailers, including M&S and Liz Claiborn, are now leading the charge to embrace accurate colour on screen systems, and have already reaped the benefits of massive savings in time and money across the product development cycle. Chris Sargeant, former head of colour management at Marks & Spencer, reviews the situation.