It seems the chromaticity diagram from CIE 1931 is the only one really used, although 1976 is considered to be a significant improvement. Do I have that right? We are deciding which to show first in our software, and I'd love any input I can get from the colorati! - J Jeff Nova Chief Executive Officer Colorhythm https://colorhythm.com Mobile: +1 510-710-9590 Main: +1 415-399-9921 *This electronic mail and the documents accompanying it are considered trade secret, confidential and/or proprietary by Colorhythm LLC. This information is intended for use by the individual or entity to whom this e-mail is addressed. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited.*