ColorCode

ColorCode is a two-dimensional "bar code" that uses colors to encode data. It has been referred to as a "3D bar code" because it has color depth as its third dimension. (There have even been references to "4D bar codes" consisting of something like a ColorCode being displayed on a monitor or phone display in a manner where the colors keep changing, adding time as a fourth dimension.)

ColorCode is a proprietary system (covered by US patents |6,981,644, |7,020,327, and |7,487,914) which was developed in Korea and is used mostly in Asia.

ColorCode bar codes might not actually look like bar codes; it is possible to "hide" a ColorCode in an image or colored text piece, as long as the proper pattern of colors is present.

Software

 * Mobile download (Singapore only)

Links

 * Official site (US)
 * Official site (Singapore)
 * Discussion of ColorCode
 * Article about ColorCode
 * Paper describing system