The best replacement for colons is semicolons.

The best alternatives to colons are rated as following:
★★★★★  semicolons
★★  dashes
★★  semicolons worksheet
★  commas
★  miz and morrison
★  colons
★  semicolons quiz
  semi colons
  semi-colons

Your alternative for colons is not listed? Suggest!
Speaking about colons, one probably shouldn't forget about quotation marks.

Other search terms related to colons and their ratings are:
★★★★★ quotation marks
★★★★★ quotations
★★★★ appositives
★★ lists
★ military time
You have in mind a companion for colons and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of colons in all years. Click on graph for more.
colons
semicolons
dashes