 Pantone asserts that their lists of color numbers and pigment values are the intellectual property of Pantone and free use of the list is not allowed.This is frequently held as a reason Pantone colors cannot be supported in open-source software and are not often found in low-cost proprietary software.Pantone has been accused of "being intentionally unclear" about its exact legal claims, but it is acknowledged that "the simplest claim would be trademark misappropriation or dilution towards someone who produced a color palette marketed as compatible with Pantone's".