Color illusion

Advanced color, backward color The advancing color is warm and the receding color is cool. The advanced color appears to protrude toward you, and the backward color appears to be dented in the back.

It is important to combine light and dark colors to make the text easier to read. White letters on a black background such as PowerPoint materials. You can use it. In the figure on the right, the letters are hard to see and shine, which is called "Color vibration".