Hi Raynold,
almost 100% certain this will also work for osclasswizard theme since they make use of bootstrap.
You have to add the code to your bootstrap theme css file, making sure it is the last css that gets loaded.
With CSS use, the last loaded css codes are used by the website OR in case you use inline markup (styling inside your pages) the inline markup will take precedence over the markup in css files. This is called 'overriding' so original css can be untouched yet you can make changes but you need to know the order of loading. Cool huh
I haven't technically checked the osclasswizard theme, maybe one of it's users can help you here in case you can't get it to work.
Regards,
Eric
will it work on osclasswizard theme.. and any specific line to put the code.