diff --git a/lib/ui/src/components/sidebar/Menu.tsx b/lib/ui/src/components/sidebar/Menu.tsx
index 10a82923c7d8..b1d20f9748aa 100644
--- a/lib/ui/src/components/sidebar/Menu.tsx
+++ b/lib/ui/src/components/sidebar/Menu.tsx
@@ -45,9 +45,21 @@ export const MenuButton = styled(Button)<MenuButtonProps>(({ highlighted, theme
   position: 'relative',
   overflow: 'visible',
   padding: 7,
+  transition: 'none', // prevents button border from flashing when focused/blurred
   '&:focus': {
     background: theme.barBg,
-    boxShadow: `${theme.color.secondary} 0 0 0 1px inset`,
+    boxShadow: 'none',
+  },
+  // creates a pseudo border that does not affect the box model, but is accessible in high contrast mode
+  '&:focus:before': {
+    content: '""',
+    position: 'absolute',
+    top: 0,
+    bottom: 0,
+    left: 0,
+    right: 0,
+    borderRadius: '100%',
+    border: `1px solid ${theme.color.secondary}`,
   },
 
   ...(highlighted && {