How do I change membership button size/?

Those ugly big blue subscription buttons that come as a default must be able to be changed to match one’s website. Even Paypal has better ones :slight_smile:

How do I get them to match existing buttons? I am a graphic designer, so I can make a graphic but don’t know how to get Membership to insert it. If I can’t put a graphic in, then just changing the color and size will have to do…