Share full article Video-editing apps like Apple’s iMovie for the Mac let you swap out the green or blue screen you used for your clip’s original background and replace it with a different scene.

Is your green ... or blue in it—their choices would vary considerably. Indeed, there wouldn't be a single chip that most observers would agree is unique green. Generally, an object's background ...

It shows Peake conducting an experiment with a green ball. The white grid on the blue background behind him is numbered one to 10 on both the y and x axes. The website of the UK’s National Space ...