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Theming Riot

Themes are a very basic way of providing simple alternative look & feels to the riot-web app via CSS & custom imagery.

They are NOT co be confused with 'skins', which describe apps which sit on top of matrix-react-sdk - e.g. in theory Riot itself is a react-sdk skin. As of Jan 2017, skins are not fully supported; riot is the only available skin.

To define a theme for Riot:

  1. Pick a name, e.g. teal. at time of writing we have light and dark.
  2. Fork src/skins/vector/css/themes/dark.scss to be teal.scss
  3. Fork src/skins/vector/css/themes/_base.scss to be _teal.scss
  4. Override variables in _teal.scss as desired. You may wish to delete ones which don't differ from _base.scss, to make it clear which are being overridden. If every single colour is being changed (as per _dark.scss) then you might as well keep them all.
  5. Add the theme to the list of entrypoints in webpack.config.js
  6. Add the theme to the list of themes in matrix-react-sdk's UserSettings.js
  7. Sit back and admire your handywork.

In future, the assets for a theme will probably be gathered together into a single directory tree.

Custom Themes

Themes derived from the built in themes may also be defined in settings.

To avoid name collisions, the internal name of a theme is custom-${theme.name}. So if you want to set the custom theme below as the default theme, you would use default_theme: "custom-Electric Blue".

eg. in config.json:

"settingDefaults": {
        "custom_themes": [
            {
                "name": "Electric Blue",
                "is_dark": false,
                "fonts": {
                    "faces": [
                        {
                            "font-family": "Inter",
                            "src": [{"url": "/fonts/Inter.ttf", "format": "ttf"}]
                        }
                    ],
                    "general": "Inter, sans",
                    "monospace": "'Courier New'"
                },
                "colors": {
                    "accent-color": "#3596fc",
                    "primary-color": "#368bd6",
                    "warning-color": "#ff4b55",
                    "sidebar-color": "#27303a",
                    "roomlist-background-color": "#f3f8fd",
                    "roomlist-text-color": "#2e2f32",
                    "roomlist-text-secondary-color": "#61708b",
                    "roomlist-highlights-color": "#ffffff",
                    "roomlist-separator-color": "#e3e8f0",
                    "timeline-background-color": "#ffffff",
                    "timeline-text-color": "#2e2f32",
                    "timeline-text-secondary-color": "#61708b",
                    "timeline-highlights-color": "#f3f8fd",
                    "username-colors": ["#ff0000", ...]
                    "avatar-background-colors": ["#cc0000", ...]
                }
            }, {
                "name": "Deep Purple",
                "is_dark": true,
                "colors": {
                    "accent-color": "#6503b3",
                    "primary-color": "#368bd6",
                    "warning-color": "#b30356",
                    "sidebar-color": "#15171B",
                    "roomlist-background-color": "#22262E",
                    "roomlist-text-color": "#A1B2D1",
                    "roomlist-text-secondary-color": "#EDF3FF",
                    "roomlist-highlights-color": "#343A46",
                    "roomlist-separator-color": "#a1b2d1",
                    "timeline-background-color": "#181b21",
                    "timeline-text-color": "#EDF3FF",
                    "timeline-text-secondary-color": "#A1B2D1",
                    "timeline-highlights-color": "#22262E"
                }
            }
        ]
    }

username-colors is expected to contain 8 colors. avatar-background-colors is expected to contain 3 colors. Both values are optional and have fallbacks from the built-in theme.

These are exposed as --username-colors_0, ... and --avatar-background-colors_0, ... respectively in CSS.

All properties in fonts are optional, and will default to the standard Riot fonts.