Synonyms: blush, cast, chroma, chromaticity, chromatism, chromism, colorant, coloration, coloring, complexion, dye, glow, hue, intensity, iridescence, luminosity, paint, pigmentation, polychromasia, saturation, stain, tinct, tincture, tinge, tint, undertone, value, wash http://thesaurus.reference.com/browse/color got it from dictionary.com

Thermochromism is the property of substances to change color due to a change in temperature. A mood ring is an excellent example of this phenomenon, but thermochromism also has more practical uses, e.g. in baby bottles (changes to a different color when cool enough to drink) or kettles (changes when water is at or near boiling point). Thermochromism is one of several types of chromism.