Ingeneral, notingthecolorof a starcantellussomuchaboutitsage, temperatureandevenitschemicalcomposition, a goodplaceforustobeginisbyunderstandingwhatcoloractuallyis.
Atonetime, thedominantcolorwillwinoutandbe a goodindicatorofitstemperatureandits a slidingscaletointermsofwhatothertypesofelectromagneticradiationofstarisgettingofftheenergyconflictintowavelengthsthatareinvisibletothenakedeye, whichiswhyit's superusefultomodernastronomerstobeabletocapturedifferenttypesofelectromagneticradiation.