/* draw status first so it can be overdrawn by tags later */
if (m == selmon) { /* status is only drawn on selected monitor */
         sw = m->ww - drawstatusbar(m, bh, stext);
                 }
And in drawstatusbar():

w += 2; /* 1px padding on both sides */
ret = m->ww - w;
x = m->ww - w - getsystraywidth();
drw_setscheme(drw, scheme[LENGTH(colors)]);