Page 487
Colon
A colon may be used to introduce a letter, a list, or an important point. Colons are also used between the numbers in time.
487.1 After a Salutation
A colon may be used after the salutation of a business letter.
Dear Mr. Grave:
487.2 As a Formal Introduction
A colon may be used to formally introduce a sentence, a question, or a quotation.
Here’s how one scientist explained the danger of degrading the environment: “It’s like pulling bricks from a wall; everything will seem fine until the wall suddenly collapses.”
487.3 For Emphasis
A colon is used to emphasize a word or phrase.