Fig. 4.
(a) Endpoints of the two-dimensional L* vs. b* transform. (b) For the range of color-calibrated face colors presented, participants increase both yellowness and lightness to optimize healthy appearance.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.