Ecwid is compatible with the majority of design themes provided by third-party vendors for various site builders. Here is a collection of web directories where you can find design themes for your site builder.
For Adobe Muse:
Browse the themes directly at www.wix.com.
Ecwid + Wix merchants can match the colors of their website and store in the Ecwid Wix application settings. See details in our guide to changing design of Ecwid stores on Wix sites.