Ten Ways to Improve Color Management

9) Don’t focus too much on small Delta-E values.

Vendors frequently claim that their systems have an average measurement of difference between two colors, or Delta-E, of 0.5 or less. However, the devices used to measure targets have only a claimed accuracy of +/- 0.5 Delta-E. The maximum real-world accuracy is limited by accuracy of the measuring devices. In addition, most output devices cannot achieve consistent Delta-E values less than 2.5. Note that the largest Delta-E errors often occur in the dark shadows where they are invisible to the human eye.