"From the first day we commissioned Colour Affects, those endless, expensive, subjective arguments about colour stopped overnight."

Tim Hannagan
Global Brands & Communications Manager
Shell International Oil, UK

"I was Mr Sceptical of Trowbridge. But five years on the designs are still as fresh as ever, with colours we would never have thought of. It was very successful from our point of view, and this was reflected in our sales figures."

Charles Dawson
Managing Director
Bowyers (Wiltshire) Ltd, UK

"I dont know how you achieved it but it's amazing."

Ray Laurence
Head of Design (since retd.)
H M Prison Service, UK

"This will change the way we all use colour in future."

Chris Wright
Global Brand Communications Manager
OKI Printing Solutions, UK


"After we first worked together, I changed my whole approach to colour in design and it has made my life a lot easier."

Jon Turner
Creative Director
Alliance Boots, UK

"I was doubtful about such a systematic approach interfering with my creative freedom until I saw it in action. The Colour Affects System has helped us hugely with countless projects over the years."

Neil Whitehead
Stuff International Design, UK


"You have taught me how it is impossible to lie with colour."

Pennie Cullen
Co-author: "Your Colours, Your Home"