hwb() colors have partial support Browser Compatibility Check


CSS hwb() colors are not supported in all browsers.


Use a fallback like color: #00c4ff; color: hwb(194 0% 0%); to provide a value in browsers that don’t support HWB colors.

Applicable standards

Change history

  • 6.48 Mar 2023 CSS Colors 4 added to Chrome 111, so no longer fires for Chrome, Edge and Opera.
  • 6.44 Mar 2022 Firefox 96 now supports HWB colors.
  • 6.42 Oct 2021 Added.

This page describes a web site issue detected in HTML documents by SortSite Desktop and OnDemand Suite.

Rule ID: BugCssColorHwb