Warm colors (on the red side of the spectrum) ignite the arousal state in individuals, characterized by an increase in adrenaline, blood pressure and heart rate.

Birds perceive 'warm' colors differently from 'cool' ones ... birds were better at distinguishing some color pairs than others, even when those pairs were equally far apart on the color spectrum.

Color heat level is measured using the Kelvin temperature scale, which includes a wide spectrum of colors (deep red, orange, yellow, green, blue, and violet) and temperatures (1,000 to 10,000 ...