I am studying for MOS certification and I am stuck on organisational charts

I can insert them edit them and change the line colors and arrows but only when using the default style

When I apply a style from the autoformat style gallery it works ok but when i select all the connector lines and try to change the color by opening the autoformat shape box all the options for colors and lines tab are greyed out and cannot be selected

Can anyone help. The MOS study guide is telling me to change the color after applying the style but I just cannot do it

im sure its something simple but I just can work it out

Any help appreciated

wambaugh