Color contrast answer

Does #ffffff work on #f1f5f9?

#ffffff text on a #f1f5f9 background has a contrast ratio of 1.10:1, so it fails common WCAG contrast thresholds for text.

Sample text

Readable UI preview

Reversed pair

Check both directions in Blobb.

Open this page with JavaScript enabled to edit the colors, tune the pair, and compare it against a full palette.