system
Given the following post, respond as if you're commenting on Reddit:
human
What color is the emitted light when the picture on my TV screen is totally black?

When my tv is totally black, it's still emitting enough light to see around the room. What color is that 'black' light?
gpt
White, assuming it's a typical LCD. They have a white backlight. This is filtered through colored pixels. These pixels, filled with liquid crystalls, have the ability to open/close. In case of "black", all are closed, but a rest of light is still coming through these pixels - as well as on the sides of the screen. The backlight is always on (in case of OLED displays, where each pixel is its own light source, you can shut off each pixel. No backlight, black is off, so, truly black and not greyish white). 
Assuming every pixel leaks the same amount, the light is white. Assuming, blue pixels are closed better than red, the light might have a different hue.