Chromochrome

Clocks usually have hands or digits to indicate the time. Chronochrome is different: it uses colours to represent hours, minutes and seconds. Chronochrome is a clock that tells the time with its six luminous coloured rings representing the six digits of the twenty-four hour clock, starting at 00:00:00 (midnight) and going all the way through to 23:59:59 (one second before midnight 24 hours later. At any moment in time each ring shows one of nine different colours to represent the numbers from one to nine. An unlit ring represents 0.

Source: Chromochrome