If you use a custom select, update your <datalist>, you should be good, shouldn't you? There are UI components that are not available in native browser control

If you use a custom select, update your <datalist>, you should be good, shouldn't you? There are UI components that are not available in native browser controls (infuriatingly: some are only available in some browsers on some platforms), but even then you're better off writing a shim to replicate normal browser behaviour than ruining the experience for everyone because Firefox on Android doesn't have a colour picker.