(c) Content can be conveyed without color

How to Check

Ensure sufficient color contrast between text and background

Highest contrast color scheme: black text, white background

Review page content and layout in black & white

Vischeck

http://www.vischeck.com/vischeck/vischeckURL.php

Check color contrast index

http://juicystudio.com/services/colourcontrast.php

Check for “color words” in your content