Skip to Content

Use a colon:

  • to join 2 independent clauses when you wish to emphasize the second clause
    • e.g. The rain caused considerable flooding in British Columbia: Highways 1, 1A, 2 and 4 were all closed for five days after the storm.
  • after an independent clause when it is followed by a list, a quotation, appositive, or other idea directly related to the independent clause.
    • There are six colours in a rainbow: red, orange, yellow, green, blue, and violet.

(Source: The Owl at Purdue: Brief Overview of Punctuation)

For more information regarding the proper use of a colon, please refer to Punctuating sentences: Commas, semicolons, and colons (Flash presentation). Also, please visit "Back to basics with colons" in Writing Tips.