The value of a hue describes the light or darkness of a hue. If values are close, meaning if they are very similar to our human eye, images blend together. If values are very different (greater contrast), parts of the image that are most different will "pop". Using the image terminology/Demos/abby.jpg, we will show a sample of value.
When the hues are at the dark end of the spectrum, the subject of the image is hard to determine and everything blends together. 2013 Tracy Berry
When the hues are at the light end of the spectrum, the subject of the image is easy to determine, the cat "pops" and is easy to recognize as the subject of the image. 2013 Tracy Berry