In fact, it&#x27;s not using the default favicon, it&#x27;s dedicated. It uses a specific SVG file with a specified color when the tab is active.<p>&lt;link rel=&quot;mask-icon&quot; href=&quot;website_icon.svg&quot; color=&quot;red&quot;&gt;<p>Ref: <a href="https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;ios&#x2F;documentation&#x2F;AppleApplications&#x2F;Reference&#x2F;SafariWebContent&#x2F;pinnedTabs&#x2F;pinnedTabs.html" rel="nofollow">https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;ios&#x2F;documenta...</a>