As a simple example, why do people take photos during the day do not look comfortable to take pictures at night.
Photos taken during the day, all kinds of colors are photographed, but also the messy things in the film,
While filming at night, most of them are black, removing those unnecessary, leaving a wonderful black more foil besides the main highlights of color and content.
This approach can also be applied to the PPT design.
It is obvious that the first picture of the color is too much, very messy and very flowers, black and white will be much better.
So, when we come across a picture with a lot of color and clutter, it's a good way to go black and white.
Black and white is simple but not simple.
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