private void updateHighlightColors()
{
if (DesignMode)
{
return;
}
_mouseOverBackColor = BackColor.BlendWith(_highlightBackColor, _highlightMouseOverOpacity);
_checkedBackColor = BackColor.BlendWith(_highlightBackColor, _highlightCheckedOpacity);
_focusBorderColor = BackColor.BlendWith(_highlightBackColor, _highlightFocusOpacity);
}