Section 508 sets the (US) government's standards for accessibility on web sites as well as applications. Contrast is specifically called out in two sections of

Section 508 sets the (US) government's standards for accessibility on web sites as well as applications. Contrast is specifically called out in two sections of the quick start guide: 1. 1194.21 (g) Applications shall not override user selected contrast and color selections and other individual display attributes. 2. 1194.21 (j) When a product permits a user to adjust color and contrast settings, a variety of color selections capable of producing a range of contrast levels shall be provided. See: http://www.section508.gov/content/learn/standards/quick-reference-guide http://www.section508.gov/content/learn/standards/quick-refe...