Where to change the styles/colors of the "Apply" and "Cancel" buttons on a Multi-Picklist Filter

Amy, thanks for the response, and that makes a lot of sense. I tried the custom css on the table and was able to change the colours for the Save and Cancel buttons. However, the colour of the buttons on the drop down for multi-select picklists remained the same. Have attached an example to further clarify. I think I just need to figure out which css property controls these specific buttons and I should be good to go. If you or anyone knows the property in question, or could direct me to how I can figure it out, it would be very much appreciated. Thanks again, Dave