White pages and Yellow pages

White pages noun - A telephone directory or section of a directory (usually printed on white paper) where the names of people are listed alphabetically along with their telephone numbers.

Yellow pages and white pages are semantically related. In some cases you can use "Yellow pages" instead a noun phrase "White pages".

Yellow pages noun - A telephone directory or section of a directory (usually printed on yellow paper) where business products and services are listed alphabetically by field along with classified advertising.

White pages and yellow pages are semantically related. You can use "White pages" instead a noun phrase "Yellow pages".