Did it work? The red Delete-button is designed to get the user's attention that what they are about to do, might have implications that are irreversible, such as "Delete account", etc.
Use this in two ways:
1. Delete button standard. Use the more subtle, red link (with or without an icon) on a page, in a table, for instance.
2. Delete button confirm. This button stands out with a solid, red background and is used in the confirmation dialogue.
Above: 1. Delete button standard
Above: 2. Delete button confirm