CSS Icon

Q: When should I use it instead of a similar icon?

Use it for stylesheet panes in a code playground, beside the markup and script panes; custom CSS settings in a site builder where owners restyle a theme with their own rules; and file tree rows and attachment chips for .css files and compiled stylesheets. For markup files, page templates and the structure pane of a code playground, use the HTML icon. For theme palettes and brand settings in an app's appearance panel, use the Color Swatch icon.

Shield with a stylized 3 on its face, the CSS3 logo, for stylesheet labels, code languages and skill tags. Available in 4 styles (outline, solid, duotone and filled) as a React component you install with the shadcn CLI.

Preview

CSS icon in outline, solid, duotone and filled styles

16px
20px
24px
32px

Install and code

pnpm dlx shadcn@latest add @reui/icons/default/filled/css

Writes reui/icons/default/filled/css.tsx

Icon installs need ReUI Ultimate

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CSS icon in shadcn/ui components

Button

Icon button

Button group

Dropdown menu

Input group

Empty state

No custom CSS yet

Add custom CSS to restyle this site on top of the theme defaults.

CSS icon FAQ

What does this icon show?

Shield with a stylized 3 on its face, the CSS3 logo, for stylesheet labels, code languages and skill tags. Typical uses: code snippet language label, frontend skill tag on profile and tech stack filter option.

When should I use it instead of a similar icon?

Use it for:

Stylesheet panes in a code playground, beside the markup and script panes
Custom CSS settings in a site builder where owners restyle a theme with their own rules
File tree rows and attachment chips for .css files and compiled stylesheets

For markup files, page templates and the structure pane of a code playground, use the HTML icon. For theme palettes and brand settings in an app's appearance panel, use the Color Swatch icon.

Which styles does it come in?

4 styles: Outline, Solid, Duotone and Filled. Every style is drawn on the same 24 by 24 grid and installs as its own file, so you can switch styles without touching the layout.

How do I install it with the shadcn CLI?

Copy the install command from the panel above, in the style you want, and run it in your project. The shadcn CLI adds the icon as a React component that you import and render like any other. It draws in the current text color, so your text color and size classes style it. Icon installs need a ReUI Ultimate license.

What icons go well with it?

Icons from the same family and the Brands set: Android, Angular, Apple, Behance, Blogger and Bootstrap.

When was it added?

It joined the ReUI icon library on June 30, 2026.

For AI Agents

Hand your agent this brief or the ReUI MCP, not a screenshot. Installs with a ReUI Ultimate license.

When to use

Stylesheet panes in a code playground, beside the markup and script panes
Custom CSS settings in a site builder where owners restyle a theme with their own rules
File tree rows and attachment chips for .css files and compiled stylesheets

When not to use

Markup files, page templates and the structure pane of a code playground: use the HTML icon
Theme palettes and brand settings in an app's appearance panel: use the Color Swatch icon

Agent notes

Name an icon-only button with its label, "Add custom CSS", as the aria-label

Markdownhttps://reui.io/icons/preview/css.md

MCPget_icon("css")

Installnpx shadcn@latest add @reui/icons/default/duotone/css

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