Can I Use High contrast bookmarklet

javascript:(function(){var a=document.createElement('style'),b;document.head.appendChild(a);b=a.sheet;b.insertRule(':root {--primary-bg: white !important; --primary-bg-shade-1: white !important; --primary-bg-shade-2: white !important; --primary-bg-shade-3: white !important; --supported: #84CC16%20!important;%20--no-support:%20#DC2626%20!important;%20--no-support-alt:%20#b43b2b%20!important;%20--partial:%20#22D3EE%20!important;%20--partial-alt:%20#06B6D4%20!important;%20--no-support-pattern:%20var(--no-support)%20!important;%20--supported-fg:%20black%20!important;%20--partial-pattern:%20var(--partial)%20!important;%20--partial-fg:%20black%20!important;%20--no-support-fg:%20white%20!important;}',0);})()