I don't sell the art framed. There are people more experienced at shipping frames providing a better selection and affordability. I have affiliated with Amazon to provided a link to correct sized frames for the pieces I sell. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
You can find different mat colors within their search functions.
Your local frame shop (like Michaels) can also cut custom color mats at greater selection without having to buy the framing service.