If you are storing layout information, like text colors etc, definately put them into a text file.
Why? because a file-access is much simpler and faster than accessing the database. It takes fewer resources too. And because the data is 99.9% static anyway, a textfile sounds perfect.
You can write a simple php file that sets a few constants which you can then use in the page itself to print at the points where you want to use them.
