Uses for a blue screen
- Checking blue sub-pixels. On a pure blue screen, any pixel whose blue part has failed shows up as a black dot.
- Video backdrops. Blue has long been used for chroma keying. It works well when your subject is wearing green, or for night scenes. A large screen showing blue behind a small subject can stand in for a backdrop cloth.
- Cool mood lighting. A blue glow suits gaming setups, parties and streams.
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How to use it
Press Start blue screen or click the preview. Dim it with the slider, or the arrow keys during full screen. For chroma keying, choose a mid blue rather than the brightest blue, light it evenly and avoid reflections on the glass. Press Esc or double-click to exit.
Blue screen for photography and atmosphere
Blue light works well for night-time looks in photos and video: a blue screen behind or beside a subject gives the impression of moonlight or a city at night. Combine it with a warm light from the other side for the popular "teal and orange" film look. For chroma keying on a small scale, such as shooting a toy, a model or a product, a large TV or monitor showing even blue can replace a backdrop cloth. Keep the subject a little away from the screen, light it separately and avoid shiny objects that will reflect the blue. For a gentle mood light, choose a deep, darker blue at low brightness so the room glows rather than glares.