Figure-Ground perception is a popular psychological factor where the negative and positive, the divide or contrast within an element or in this case art creates a visual illusion of another image. Like the image above, Apples logo as you know, has a bite in the corner, or a missing edge, but instead they used Steve Job’s head to mock the cut out of the image. This is interesting as his face doesn’t necessarily look appealing within the image, but to people who understand what the image represent, we can find this work to be eye-drawing and interesting. This image is only possible because the background is all black and the main aspect, the logo is a different color. In reality you can still get the same visual result even if you had different colors. Though it wouldn’t be as effective as having two opposite colors clashing with each other.
image from: https://www.usertesting.com/blog/2016/02/24/gestalt-principles/