im currently attempting to integrate Stripe into a little website.
I can see within Firebug, that this get request runs correctly
https://checkout.stripe
I got the same error and setting color didn't work for me. I changed the path of the image to the one given in Stripe documentation:
Changed
https://stripe.com/template/img/documentation/checkout/marketplace.png
to
https://stripe.com/img/documentation/checkout/marketplace.png