Visio2007: Prevent themes from affecting shapes
Visio2007
To prevent Visio2007 themes from being applied to a particular shape, you can not allow themes to be applied to the shape, or you can protect the shape from theme colors or theme effects.
Do not allow themes to be applied to shapes
Right-click the shape, point to format, and then uncheck the Allow Topics command.
Protect shapes from theme colors or theme effects
Select the appropriate shape.
On the Format menu, click Protect.
In the Protection dialog box, select the Prevent theme colors from applying or prevent theme effects from being applied check box.
Note If you want to use a text color, line color, or fill color that does not change the hue when you apply a theme, click the arrow next to the text color, line color, or fill Color tool on the Formatting toolbar, and then select a color under standard colors.
Some of the shapes that are included with Visio2007 are not affected by the theme by default. Allowing themes to affect these shapes can cause unexpected results.