CMFCColorButton control in an MFC Ribbon Bar

(with the help of MSDN and google)

You need to "find" the button by ID (kind of a bummer, but I've not looked further into that) in the handler of the button


// new handler for the button in the ribbon bar. (created when editing the ribbon in the resource editor

//...
ON_COMMAND(ID_BUTTON5, &CMainFrame::OnColorButton)
//...
void CMainFrame::OnColorButton()
{
  // ID_BUTTON5 is the ID of the color button I created in the resource editor.
  CMFCRibbonColorButton* pColorBtn = DYNAMIC_DOWNCAST( CMFCRibbonColorButton, m_wndRibbonBar.FindByID(ID_BUTTON5));
  COLORREF color  = pColorBtn->GetColor();
}

(tried on VS11, I don't have other version at home, so YMMV).