If you’ve had any classes or done any reading on basic color theory, you’ve no doubt came across the concept that hot colors (red, orange and yellow) ‘advance’, or appear to move forward, while cool colors (purple, green, and blue) recede, or fall back. If you’ve played with colors in your work, you’ve probably noticed it yourself. But, do you know why this happens? If you’ve ever had to sit through a class where someone who didn’t know why this happens tries to explain it, you’ve likely lost an hour or so of your life. The answer is actually much simpler than many that I’ve heard.