Button with a blue backlight, very beautiful at night Kaideng can not use.

按键带有蓝色背光，很漂亮，晚上不开灯也能使用。

youdao

Button with a super-bright blue backlight, very beautiful at night Kaideng can not use.

按键带有蓝色超亮背光，很漂亮，晚上不开灯也能使用。

youdao

Smart blue design and backlight airflow parameter improve working environment and working mood.

趋时的蓝色外瞉及蓝背光的气流计，改善传统的工作环境及提升工作气氛。

youdao

The T28 is equipped with a tiny (to today's standards) rectangular 1.4-inch monochrome screen (101 x 33 pixels or three lines of 12 characters) with a blue-ish green backlight.

ENGADGET: Ericsson T28z review Mobile

The display's backlight has nanopatterned grooves that send blue, green and red in multiple directions, letting the LCD show only the light that would be seen from a given viewpoint.

ENGADGET: HP Labs builds a glasses-free, portable 3D display with wide viewing angles (video)