One way to introduce students to the power of persuasion and to show them evidence of logical fallacies is to have them analyze advertisements in print and digital media.
You can have students write and post their analysis or present their findings in a speech using visual aids. You may find paying attention to color adds an important dimension to student understanding of media. See Color Symbolism Chart. Here’s a link for more information about color and cultural associations.
Here’s another site related to color in advertising.