You can change the print button color using Live Formatting. (http://support.easyrecipeplugin.com/knowledge-base/how-to-use-live-formatting/)
However you seem to have another issue as well. The print button isn't even being formatted and I *think* it may be an issue with your caching. Try clearing your WP Super cache caches.
It also looks like your theme is loading a very old copy of the jQuery library and that might also cause problems. Make sure your theme is up to date - the version you have seems to be quite a bit out of date.
If all else fails, send us the EasyRecipe diagnostics. You can do that from the Support tab on the EasyRecipe settings page.