vterm_color_equal
|| !vterm_color_equal(cell.fg, newCell.fg)
|| !vterm_color_equal(cell.bg, newCell.bg)
if((attrs & VTERM_ATTR_FOREGROUND_MASK) && !vterm_color_equal(a->pen.fg, b->pen.fg))
if((attrs & VTERM_ATTR_BACKGROUND_MASK) && !vterm_color_equal(a->pen.bg, b->pen.bg))