How to Build a Multi-Theme SVG Switcher
Drive multiple brand color themes for the same SVG icon set using CSS variables.
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CSS Variables for Theming
Define fill and stroke colors in your SVG (or its wrapping CSS) as CSS custom properties, then redefine those variables per theme using a data attribute or class on a parent element.
- Use CSS variables for fill/stroke instead of fixed colors
- Redefine variables per theme via data attribute/class
- One icon set serves unlimited brand themes
Switching Themes at Runtime
Toggle the theme attribute or class with JavaScript, and every SVG icon referencing those CSS variables updates instantly without needing separate per-theme icon files.
- Toggle one attribute/class to switch all icons
- No separate icon exports needed per theme
- Persist the selected theme for return visits
Frequently Asked Questions
Do I need separate SVG files for each theme?
No — if your icons use CSS custom properties for color, one SVG set works across all themes; you only redefine the variables per theme.
Can inline SVG and CSS variables work together for theming?
Yes — inline SVG can reference var(--icon-color) in its fill/stroke attributes, inheriting whatever value is set on a parent scope.
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