Examples of Good and Bad Contrast

There are many different examples of tricky color combinations and bad contrast available on the Internet. In the interest of time, I am only sharing one example image to illustrate the point that color contrast can be tricky.

Bad contrast; difficult to decipher the letter "A" on its colored background. "B" has better contrast.

Source: Serendip Studio Contrast/Color "Illusions" Links to an external site.

Above: The letters A and B are the same color of gray, but the difference in contrast to the background makes them appear to be of different color values.