Traits

Cool Tones have hues between 160° and  290° on the HSV or HSL scale. This section is mostly blue tones.

Pure grayscale, which has equal parts red, green, and blue, and therefore has a saturation of 0, defaults to a hue of 0° in most art programs. In reality, it is the exact same color no matter what degree of hue it is at, with the only possible change depending on brightness/value. Because of this, pure grayscale will count as Cool Tones only if there is another tone present that falls under cool tones.