The primary logo is the full color logo.
While not ideal, some design situations require alternate versions of the logo, including a full-color reverse version and one color logos.
A one color logo is only acceptable when media reproduction is limited. In these cases, the logo may be reversed to white on a brand color or image. A black logo is allowed when media reproduction is black only.
If you are using the logo against a dark background (i.e. dark navy or black) or image, use the full color reverse logo. This is preferred over the one color logos above.
While not ideal, some design situations require alternate versions of the logo, including a stacked version. This alternate version should be used sparingly and only with permission from the marketing team.
The same guidelines for single color usage and knocked-out versions apply.