In a brand new installation of LimeSurvey 6.15.5, the administration interface has many accessibility problems when using the new Sea Green theme (only option in this version). Most of the screens show multiple problematic elements that don't pass the WCAG 2 standars. This will cause problems in adopting version 6 since WCAG 2 is the minimum standard requirement for web in our institution, and I imagine this being the case for many other places using LimeSurvey as their online surveys tool.

I used the WAVE browser extension to assess accessibility in a LimeSurvey 6.5.15 local installation. As an example, the surveys list page showed a total of 85 accessibility, 20 of them being low contrast errors. The low contrast issues are very evident, but there also other accessibility elements detected that cause issues with screen readers. I think it would be very important to work on the Sea Green accessibility issues, it being the default admin in LimeSurvey 6, to make it at least WCAG 2 compliant.