Stripe - Branding
You can add your logo and colors to Stripe's checkout pages and emails. Once you have your logo and site colors set on your website, you should add those items to your Stripe account.
Login to Stripe Dashboard - After you have your Stripe account setup, login to your Stripe account to access the Stripe dashboard.
On the dashboard menu click on Settings. Scroll the settings down until you see Business settings and click on Branding.
The Branding page will appear:
This is where you can add your logo, set brand colors and see a preview of how your logo will appear on Stripe's checkout pages, customer portal pages and emails.
For detailed instructions and online help use Stripe's support site which you can access from the top right of the Stripe Dashboard: