The theme-color value for the name attribute of the {{htmlelement("meta")}} element indicates a suggested color that user agents should use to customize the display of the page or of the surrounding user interface.
If specified, you define a theme color using a content attribute in the <meta> element as a CSS {{cssxref("<color>")}} value.
For example, to indicate that a document should use cornflowerblue as a theme color, set the <meta> as:
<meta name="theme-color" content="cornflowerblue" />
To set the media to which the theme color metadata applies, include the media attribute with a valid media query list (see the theme-color media query example).
Usage notes
A <meta name="theme-color"> element has the following additional attributes:
content- : A
<meta>element withname=theme-colormust have acontentattribute that defines the theme color. The value ofcontentattribute is as follows:{{cssxref("<color>")}}value- : A valid color value, such as hexadecimal, RGB, named color, etc.
- : A
media{{optional_inline}}- : Any valid media type or query.
If provided, the options for the document’s theme color defined in the
contentattribute are suggested to the browser when the media query matches.
- : Any valid media type or query.
If provided, the options for the document’s theme color defined in the
Examples
Setting a color value
Consider the following code that uses <meta> to set a theme color:
<meta name="theme-color" content="#4285f4" />
The following image shows the effect of this setting in Chrome on an Android mobile device:

Image credit: from Icons & Browser Colors, created and shared by Google and used according to terms described in the Creative Commons 4.0 Attribution License.
Using a media query with theme-color
You can provide a media type or query inside the media attribute.
The theme-color will then only be set if the media condition is true.
For example:
<meta
name="theme-color"
content="cornflowerblue"
media="(prefers-color-scheme: light)" />
<meta
name="theme-color"
content="dimgray"
media="(prefers-color-scheme: dark)" />
Specifications
{{Specifications}}
Browser compatibility
{{Compat}}
See also
<meta>nameattributecolor-schemevalue{{cssxref("color-scheme")}}CSS propertyprefers-color-schememedia query