Simple Theme - Customising your password page
From Spiffy Stores Knowledge Base
Passsword Page
The Simple Theme includes a styled password page, which can be enabled in the Preferences -> General Settings -> Password Protect Access to your Store section of your store admin.
Once you have enabled password protection, the page can be customised in your Theme Editor. The following options are available;
- uploading your own background image
- customising the title
- customising the text colour.