This assessment is very simplistic and constitutes a basic preliminary review. It is not comprehensive nor exhaustive.
I chose themes from the Free Theme Directory and searched for Web Accessible and Accessibility. I narrowed my selection by considering which theme would be easily customizable, have good contrast between foreground and background, have elements in a convenient location and be aesthetically pleasing as is.
I then used the plugin Demo Data Creator to generate more content for posts, pages, comments and categories.
The following themes made the cut:
Precious version 4.0.1
At first glance the layout is pretty simple and effective. Convenient breadcrumb on top of page. Upon disabling the style sheets, nothing is out of order. Validates for XHTML 1.0 Transitional and CSS2.
Stardust version 2.7
Very stylish out of the box with flexible width. Has “Skip to content” and “Skip to menu” without CSS. By disabling the images, the date for each post is too dark. Validates for XHTML 1.0 Strict, but not in CSS with 6 CSS2 errors.
Whitepress version 1.1.7
Dodo version 1.2.1
This theme is what this website is based on. The color of the posts date and other meta information is also too light. By disabling the images, the text of the main menu has not enough contrast with its background. With a little tweek here and there, it’s really nice. Fails to validate with XHTML 1.0 Strict with 1 error, but passes CSS2.
Precious and Stardust passed the Firefox Accessibility Extension 184.108.40.206 rule set with only warnings signaled .The themes Whitepress (2 Fails) and Dodo (1 Fail) did not pass.
For validation, I used Markup Validation Service and The W3C CSS Validation Service.