A horology component (1) for a timepiece, including a first portion (10) and a second portion (20), the first portion (10) comprising one part that is at least partially transparent and at least partially superposed on top of the second portion (20), this second portion (20) taking the form of a massive portion comprising a material capable of emitting at least one emission light wave if excited by at least one excitation light wave, and the at least partially transparent part of the first portion allowing an emission light wave emitted by the second portion (20) to be transmitted at least partially toward the outside of the horology component so that the horology component exhibits at least a first appearance by day and at least one different second appearance by night where the first portion (10) is backlit by an emission light wave emitted by the second portion (20).

A horology component (1) for a timepiece, including a first portion (10) and a second portion (20), the first portion (10) comprising one part that is at least partially transparent and at least partially superposed on top of the second portion (20), this second portion (20) taking the form of a massive portion comprising a material capable of emitting at least one emission light wave if excited by at least one excitation light wave, and the at least partially transparent part of the first portion allowing an emission light wave emitted by the second portion (20) to be transmitted at least partially toward the outside of the horology component so that the horology component exhibits at least a first appearance by day and at least one different second appearance by night where the first portion (10) is backlit by an emission light wave emitted by the second portion (20).

A digital color clock employs six Color Outputs to represent the time of day. A first Color Output represents a tens digit of hours, a second Color Output represents a ones digit of hours, a third Color Output represents a tens digit in minutes, a fourth Color Output represents a ones digit in minutes, a fifth Color Output represents a tens digit in seconds, and a sixth Color Output represents a ones digit in seconds. The digital color clock can optionally display the date, temperature, humidity, and/or barometric pressure using Color Outputs. Front and back light sensors can be included for measuring brightness of ambient light to enable adjustment of Color Outputs in response to changes in brightness of ambient light. In one embodiment, the Color Outputs are interspersed among other unchangeable Color Outputs of a display. The display can be a component of a stationary or hand-held computing device.