This websites contains a web development tool, which can be found under the heading Palette. The purpose of the tool is to assist web designers and developers in selecting a range of colours to use on a website and quickly reveal which pairs will pass or fail at the three different WCAG 2.0 contrast ratio values.
The Web Content Accessibility Guidelines (WCAG) have been put into place so that when websites are made they will be accessible to people with different impairments. Part of the guidelines deal with addressing how to improve website accessibility for people with visual impairments.
This website also serves to provide web designers and developers with in-depth understanding understanding of what colour vision deficiency (CVD) is, the different types of CVD that are known and why it is important to consider when building a website. Go to the CVD info section of this website to find out more.