Question

When is a colon used in a title?

Answer 1

The most important thing to remember about colons is that you only use them after statements that are complete sentences. Never use a colon after a sentence fragment. For example, it's correct to say, "Grammar Girl has two favorite hobbies: watching clouds and seeing how long she can stand on one foot."

Answer 2

A colon is used to give emphasis, present dialogue, introduce lists or text, and clarify composition titles. Emphasis—Capitalize the first word after the colon only if it is a proper noun or the start of a complete sentence.