Color has temperature

it can create impression of warmth or coolness.

Plate9 Temperature in Color

(Source:http://www.google.co.in/search?hl=en&q=Color+has+Temperature&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1350&bih=
559&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=67rQT7PaNIzrrQew0sWKDg#um=1&hl=en&tbm=isch&sa=1&q=temp
erature+color+scale&oq=temperature++color&aq=1&aqi=g4gm6&aql=1&gs_l=img.1.1.0l4j0i5l6.67558.67558.4.72664.1.1.0.0.0.0.124
.124.0j1.1.0.ckh.1.0.0.IZAhpo8TwUA&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=ffcb83f7ab9787b&biw=1350&bih=559 ; June 7, 2012)

The above color strip (plate9) shows, physically the blue has higher temperature while red has the list temperature. For colors based on ‘black body’ theory, blue occurs at higher temperatures, while red occurs at lower, cooler, temperatures. This is the opposite of the cultural associations attributed to colors, in which "red" is "hot", and "blue" is "cold".

Warm and cool colors application is by analogy to feelings. Physically there is no color that gives us feeling of hot or cold, it is our psychological experience that we connect to each color. In the context of color pigment in art and design, when artists refer to temperature, what they are referring to is the degree of warmth or coolness measured in relationship to another color creating a measure of contrast.