The histogram is a seldom-used tool but the more deeply you understand it the better you can revamp your illustration process and make better work. The histogram can be made visible by clicking “histogram” underneath the WINDOW option at the top of photoshop. This tool can be life-changing, to get better results when trying to create mood and contrasts.

Histograms are graphs that represent all the values in your picture. Selecting a certain part of your picture with the lasso tool will also show you the value range within that specific area you select.

Histograms that mound up on the left side of the image are considered low-key. These pieces may have a dramatic, dark mood. In the example below I show a low key piece at the histogram that represents all the values.

If the histogram mounds up on the right side, like in the image below, it is a high key piece. These pieces may have a happy or even ethereal mood.

Most pieces can be spilt between high and low key and create an array of moods. Paying attention to the histogram can help us nail the mood we are going for. If our values get muddy, the histogram will tell us.

Looking for more ways to keep your eyes fresh while painting? Check out this video where I outline ways to spot mistakes in your work: How to Spot Mistakes in your work