the first of a 2-part article on the ideas and howto deploy multimedia objects within assessments in moodle

A tool for checking foreground & background colour combinations to determine if they provide good colour visibility. Determining "colour visibility" is based on algorithms suggested by the World Wide Web Consortium (W3C): "Two colours are considered to provide good colour visibility if the brightness difference and the colour difference between the two colours are greater than a set range." The range suggested by the W3C is > 125 for colour brightness and > 500 for colour difference.