I have been searching in my SharePoint 2007 site, but all I see it's the already made themes, since our company have their unique color and they want me to put their color to represent their company.
So any suggestion?
You can use one of the themes that is available out of the box. To change
To create your own theme
Step 1 – Copy existing theme
Step 2 – Edit Setup Information File
Step 3 – Edit SPTHEMES.XML
Next we need to edit this file so that we can actually choose our newly created theme. This will make it available in the list of themes on the Site Theme page.