Here is one big mistake I see frequently: Designers use color difference to produce contrast instead of value difference. For instance… a medium value blue sitting on top of a medium value red produces some contrast. You CAN see the difference between the two. But when you have two colors together of the same value – it produces what is known as “vibrating.” You’ll notice that at the line where the blue and red meet your eye seems to oscillate back and forth between the two. It almost feels like the text is pulsing
