Buttons, labels, and form text may appear clear on one monitor but become difficult to read on a phone or in bright light. Color contrast should be checked for normal text, larger text, focus indicators, disabled states, and errors—not only the main page background.
Use a contrast checker with the rendered foreground and background colors. Test hover, focus, validation, and selected states. Do not use color alone to communicate success, error, or selection; pair it with text or another visible cue.
Informatix Systems lists web performance and accessibility related services. A focused review can identify visual barriers in important customer paths. Contact Informatix Systems to discuss web accessibility.