To meet the Web Content Accessibility Guideline (WCAG) 1.4.11 standard for non-text accessibility, we changed the styling of highlighted and selected content throughout the Lightning UI. Previously, we applied our own styling to show when content was highlighted or selected, but have determined that the styling didn’t meet this WCAG standard. Now when you highlight or select content, the Lightning UI uses the styling applied by the user agent, which is your browser or device. The user agent determines the color contrast ratio.
Where: This change applies to Lightning Experience.
Why: Meeting accessibility standards helps your UI support all of your users.