WCAG 2.2 Success Criterion 1.4.3 Contrast (Minimum)
The visual presentation of text and images of text has a contrast ratio of at least 4.5:1.
The only exceptions to that are as follows:
Large Text: large scale text (at least 18pt or 14pt and bold) must have a contrast ratio of at least 3:1.
Incidental: text that's part of an inactive user interface component, isn't visible to anyone, or that is purely decorative, have no contrast requirement.
Logotypes: text that is part of a logo or brand name has no contrast requirement.
This box has a background of #004b80 and text color white. Contrast Ratio: 9.05:1
This box has a background of #fbaa19 and text color black. Contrast Ratio: 10.86:1
This box has a background of #7eb6e3 and text color black. Contrast Ratio: 9.68:1
This box has a background of #787878 and text color black. Contrast Ratio: 4.75:1
Please Note: The following examples fall below minimum color contrast and in some cases may be difficult to read. This is intentional.
This box has a background of #fbaa19 and text color white. Contrast Ratio: 1.93:1
This box has a background of #7eb6e3 and text color white. Contrast Ratio: 2.16:1
This box has a background of #787878 and text color white. Contrast Ratio: 4.41:1