Change the spree logo in the paypal payment

How I can change the spree logo in the paypal payment page?

• Login to your paypal account
• click on profile click on custom page styles
• click on add Change PAge Style Name to something different to PayPal
• Set up your custom Page Style
• Once your finished, click on Preview to see how your checkout page looks
• If it suits you click on Save On the main custom page styles page, please choose your page style and click on make Primary
• After you've done that your customers will see your customized checkout page

If you are using a third party shopping cart, you could check with them if they are over-writing PayPal checkout page styles.