reground color of high contrast mode text by specifying the CSS <code>currentcolor</code> value for the <code>stroke</code> property of the inline SVG <code>rect</code> element used to draw the focus ring border.
            To make the background of the <code>rect</code> match the high contrast background color, the <code>fill-opacity</code> attribute of the <code>rect</code> is set to zero.
            If specific colors were instead used to specify the <code>stroke</code> and <code>fill</code> properties