It is clearly a tool for webdesigners. And it consists in a standard HTML page which uses Javascript scripting language and stylesheet properties. A browser from Netscape or Microsoft version 4.x and over, with Javascript and CSS options activated . Usual caveats, it has not been tested on all the many possible configurations in the galaxy so, there is no warranty that nColor will function on your particular system. One image is worth a thousand words, please check the heigth incarnation of nColor .
Instructions are available directly on the page.
Colour blindness is a generic term which covers different types of visual deficiencies related to perception of red, green and blue parts of colour. Some perceive all three parts but with weaknesses in some area of the light spectrum, the trichromats, others simply do not perceive one part, the dichromats. Hereunder are listed specific anomalies within these main categories. Consequently, webdesigners would be well inspired to check if their page colour set remains acceptable to protanopes and deuteranopes . The different nColor visual emulations are inspired from her work.