This is a Google Chrome extension that will add a new Accessibility sidebar pane in the Elements tab to the Chrome Developer tools. This new pane will display any properties that are relevant to the accessibility aspect of the element that you are currently inspecting. This extension also adds an accessibility audit that can be used to check whether the current web page violates any accessibility rules.
An application that simulates color blindness. It is available on Windows, Mac and Linux.
- **<ahref='https://toolness.github.io/accessible-color-matrix/'target='_blank'rel='nofollow'>Accessible Color Palette Builder</a>**
This website allows you to edit a color palette and will create a table showing all of the possible color combinations, telling you which ones are accessible and which combinations to avoid using.
- **<ahref='https://webaim.org/resources/contrastchecker/'target='_blank'rel='nofollow'>WebAIM Color Contrast Checker</a>**
This website allows you to enter in color hex values for foreground and background to evaluate the contrast ratio. You can also adjust colors entered to get the necessary contrast ratio.
WebAIM offers complete web accessibility services. Regardless of the type or size of your web site, WebAIM can help ensure that your site is accessible and usable to those with disabilities.
You can find many more tools for accessible web design on <ahref='http://www.d.umn.edu/itss/training/online/webdesign/tools.html'target='_blank'rel='nofollow'>this list</a> made by the University of Minnesota Duluth.