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Override Theme Styles

Sometimes you may need to make a small change to the appearance of a component, while still using the same built-in or custom theme.

This article provides high-level guidance about the required knowledge and tools to override existing CSS styles without changing them.

CSS Knowledge

To override an existing style, you implement another conflicting style. To make sure the new style takes precedence, it should have a higher specificity.

Tools

To see what CSS styles are applied on an HTML element, use the browser's developer tools.

Blazor CSS Isolation

CSS isolation is a .NET feature, which scopes styles to a specific Razor component.

  • There are two cases when CSS isolation may not work with UI for Blazor components. We explain the reasons and suggest workarounds in this knowledge base article. The two cases are:
    • Using isolated styles with a component Class.
    • Using isolated styles for popups (Window, Dialog).
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