I'd only add the Safari Pinned Tabs `meta` tag (https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/pinnedTab

I'd only add the Safari Pinned Tabs `meta` tag (https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/pinnedTabs/pinnedTabs.html https://developer.apple.com/library/archive/documentation/Ap...), which had you define a simple black and white SVG. This image would get used when a user pinned your tab in Safari, in color when active and black when inactive.