People with low vision often have difficulty reading text that does not contrast with its background.
This can be exacerbated if the person has a colour vision deficiency that lowers the contrast even further (W3C, n.d.).
- It also works for the rare individuals who see no colour.
Contrast ratio calculator:
Source: W3C, n.d.: 1.4.3 Contrast (Minimum) Level AA. https://www.w3.org/WAI/WCAG21/quickref/?showtechniques=128%2C124#contrast-minimum [31.8.2022].