Quick way to change suitebar color in MySites

Is there a quick way to change the blue suitebar color on MySites site collection?

I have a custom CSS stylesheet and a custom MasterPage for my main WebApplication. But this ofc does not get deployed to my MySites WebApplication. I think that I will be able to locate the SharePoint standard CSS file that styles the suitebar and change it there, but I do not like to change in the standard files.

Is it possible to make a copy of the standard MySites MasterPage, add my CSS connection to that MasterPage and deploy it to the MySites WebApp, or is there a other way/practice?

Thanks