In order to maintain consistent branding, your Shopify email notification buttons need to match the buttons on your site.
You shouldn’t have red buttons on your website, and blue buttons in your emails! That’s just plain sloppy.
Here’s how to change the Shopify default blue buttons to match your brand.
1. Click on “Settings,” at the bottom left of the page in your Shopify admin.
2. Click on “Notifications.”
3. Ignore all the links for the individual notifications. Instead, click on “Customize.”
4. Click on “Color,” and select your desired hue.