ugly information graphics
Something that hadn't crossed my mind ever, till today, when I viewed a graph online which was unreadable, is the usage of informational graphics (graphs, etc) in websites and textbooks.
Usability and accessibility guidelines state that if information is conveyed by color, it must a) have sufficient contrast to differentiate between items, and b) the information must be conveyed in an additional manner.
This would, I hope to think, apply to today's textbooks. One problem I had in school was the inability to distinguish between data of one type and data of another in the same graph or map or other info graphic, because it was only conveyed with color. Being that colorblindness is covered under the ADA, I can't imagine textbook publishers NOT dealing with this issue.
Teachers often didn't believe that I saw color differently, and simply dismissed my complaints as attempts to gain points on quizzes and tests. It was only when I got to college (and ADA was in place) that I thought that it might be time to get my optometrist to sign some paperwork.
It's so frustrating if you're in the situation and the teacher doesn't believe you or doesn't care.