Several days ago, I submitted a comment to the article Effective Web Design to Enhance Accessibility, which was recently going around Twitter. The comment wasn't published, so here it is:
Proper use of headings is another very important issue.
Comments on points above:
- Adequate font size by default is best; 16px ideal, 10 or 12 is unacceptable.
- Alternative text is a basic requirement that many folks still miss. Especially important on infographics (and comics!). If too long for alt attribute, just put text on page.
- Great point, but “link text” or “link content” may be better use of words. The “title” attribute (a.k.a. tooltip) should only be used for supplemental (and not duplicate) information.
- Symbols in addition to color is a good practice. In W3C words, “don’t rely on color alone to convey meaning”.
- Be sure to have a label for each form component (and associate correctly). Use Fieldset/Legend for long forms to break in sections.