API Reference › appui-react› State › ColorTheme ColorTheme Enumeration Enum for the Color Theme string. Members Name Value Description Dark Will use iTwinUI dark theme. HighContrastDark Will use iTwinUI dark theme with highContrast set to true HighContrastLight Will use iTwinUI light theme with highContrast set to true Inherit Will use iTwinUI wrapping ThemeProvider if provided, or default to 'Light' Light Will use iTwinUI light theme. System Will use iTwinUI os theme. Defined in ui/appui-react/src/appui-react/theme/ThemeId.ts Line 19 Last Updated: 24 June, 2025Found something wrong, missing, or unclear on this page? Raise an issue in our repo.