A Boolean value that indicates whether the app avoids conveying information through color alone.
shared AccessibilityDisplayShouldDifferentiateWithoutColor() as BooleanIf this property is YES, the user interface avoids conveying information using color alone. Instead, use shapes or glyphs to convey important information.
Users can change this setting by choosing System Preferences > Accessibility > Display and selecting the “Differentiate without color” option.