The Accessibility contrasts toggle enhances the contrast levels of colors.
The toggle also makes a Fluid Topics portal comply with level AA of the Web Content Accessibility Guidelines, which requires a 4.5:1 contrast level.
The toggle is available in the Colors section of the Theme administration interface as follows:
Fluid Topics measures the contrast between interface elements (text, lines, icons). If it is not sufficient, the application automatically modifies the colors to ensure a contrast level of at least 4.5:1.