One of the things that hurt the player's experience the most is bad readability. Under any context, messages have to be readable. To comprehend a text requires it to be read first. For a text to be read it has to be readable. The same is true for understanding and reading an environment. If the environment is confusing and overly complex it makes a bad experience for the player. Every shape and color must be carefully chosen to build an environment to make it easy for the player to grasp it. If everything is shaded in the same way it becomes hard to recognize depth. On the other hand, if everything is super bright, super dark or there are too many colors at once on screen, it becomes hard to focus on anything. Too much contrast, too low, is bad for reading.

One way to give an example is to talk about physics and music. Without variations in frequency, amplitude and wavelength everything becomes flat and lacks personality. On the other hand, too much variation in frequency, amplitude and wavelength lead to noise and confusion. An orchestra isn't played with one single instrument, but there also aren't any orchestras with 100 different instruments playing at the same time. Every type of environment has to have one dominant color.

In some games such as Counter Strike there are hacks that replace the character models' skins to make them easier to spot. For ex: turn all character's heads red. There are games with legal modifications to make the characters models easier to spot. This issue has two sides. One is art, the choices made in regards to art may lead to low contrast. The other is a matter of technology, as dynamic changes in light and environment can also lead to low contrast scenarios. One thing should be emphasized though. If the art was made with no regards to contrast, technology can't solve a problem rooted in artistic choices made. Nowadays computers aren't restricted to 256 colors anymore, but even the most powerful computer can't solve problems with creativity and art.

Now there is another way to think on contrast that isn't related to colors alone. Contrast can also be metaphorical. We have lots of examples from life itself: rich vs poor; skyscrapers vs single floor houses; high frequency vs low frequency; dirty vs clean; empty vs full; happiness vs sadness; rage vs tranquillity; straight lines vs curves. We can have the concept of opposing forces or opposing sides in many more ways other than colors alone.