<meta name="theme-color">The name="theme-color" attribute for the <meta> HTML element suggests a color that the browser can use to customize the display of the page or the browser user interface.htmlHTMLlimitedhttps://html.spec.whatwg.org/multipage/semantics.html#meta-theme-colormeta-theme-colorhttps://developer.mozilla.org/docs/Web/HTML/Reference/Elements/meta/name/theme-colorhtml.elements.meta.name.theme-colorhttps://nowyoucanuse.com/features--meta-theme-color.html