h_first = uicontrol('style','radiobutton', ...
    'string', 'First', 'callback', 'callback_first', ...
    'fontsize', 14, 'units', 'normalized', 'position', [.2 .6 .2 .1]);
h_second = uicontrol('style','radiobutton', ...
    'string', 'Second', 'callback', 'callback_second', ...
    'fontsize', 14, 'units', 'normalized', 'position', [.2 .4 .2 .1]);

% set the current figure's background color to that of the UI control
set(gcf,'Color',get(0,'DefaultUicontrolBackgroundColor'));