If you want to match Special colours accurately, for example Pantone Colours, and you have Colour Blind, you can import the Pantone colours into Swatch editor by using the import function (See release notes for 2.4 ). Once done you can import the full Pantone set into both the Partial and Exact tabs. You can then select your replace set from the pagesetup and all your specials with Pantone names or numbers will be replaced by your set you have created.