Even when using the Pantone system, colour matching is not an exact science. With this particular shade of yellow, chosen for one of our brand identities (shown above) there are big differences between the Pantone Coated and Uncoated swatches, so we had to pick a different yellow for any designs intended to be printed on uncoated paper. It can be a painstaking process, but we think it's worth the time to keep consistency across the work that we produce.