Contrast is the difference in brightness between text and the background of that text.

For most text, WCAG mandates a minimum 4.5:1 contrast, while larger text, like a Word Heading or a PowerPoint slide Title, should have a minimum 3:1 contrast. "Large text" is defined as 18 points or larger, or 14 points and larger if bold.

Poor contrast negatively impacts all sighted users. Users with low vision, color blindness, or reading disabilities may be impacted even more significantly.

• Explore an online color contrast tool provided by a third-party - WebAIM : Contrast Checker