question: Will a red object or a blue object become hotter?
comment: You ask a really complex question without a simple answer. You are correct that the red wavelength generally contains less energy than a higher frequency blue wavelength per unit, but you seem to have gotten it backwards in that a red object is *reflecting* red light, the lower energy light, so it is *absorbing* blue which is higher energy. The absorbed light is what turns into heat within the object so you should in concept expect a red object to be hotter and the blue cooler (as it is absorbing the lower energy red and reflecting the high energy blue). But wait, there is more. This all assumes that the light at all frequencies is of similar intensity which isn’t true for sunlight. The atmosphere absorbs light more or less at different frequencies so with that in account we can’t necessarily say that an object is going to be getting more energy via blue light than red. Perhaps even a more significant issue is that we are only considering visible light and not how the objects absorb in things like the ultraviolet or infrared spectrum. Perhaps the dye for blue objects is very absorptive to ultraviolet while the red dye is more reflective, that can factor much more greatly into the resulting temperature than visible light frequency. And finally there is the social aspect which might be impacting your very subjective assessment of object temperature, in that hot water is indicated by red and cool water by blue. This color coding might be subtly influencing your expectations of temperature so we would need to actually test the issue rather than just trust your gut instinct.
passages: The traditional warm/cool association of color is reversed relative to the color temperature of a theoretical radiating black body; the hottest stars radiate blue (cool) light, and the coolest radiate red (warm) light.
  
  This contrast is further seen in the psychological associations of colors with the Doppler effect seen in astronomical objects. Traditional psychological associations, where warm colors are associated with advancing objects and cool colors with receding objects, are directly opposite those seen in astrophysics, where stars or galaxies moving towards our viewpoint on Earth are blueshifted (advancing) and stars or galaxies moving away from Earth are redshifted (receding).
   Section::::Explanation.
  
  When two bodies of different temperatures meet, the hotter body will cool off, and the cooler body will heat up, until they are separated or until they meet at a temperature in between. What that temperature is, and how quickly it is reached, depends on the thermodynamic properties of the two bodies. The important properties are temperature, density, specific heat capacity, and thermal conductivity.
   BULLET::::- "Those for which the spectral distribution of energy is not identical with that given by the Planckian formula, but still is of such a form that the quality of the color evoked is the same as would be evoked by the energy from a Planckian radiator at the given color temperature."
  
  BULLET::::- "Those for which the spectral distribution of energy is such that the color can be matched only approximately by a stimulus of the Planckian form of spectral distribution."
  
  Several important developments occurred in 1931. In chronological order:
   Vice versa, it remains again unclear how to define "kind" by "similarity". Defining e.g. the kind of red things as the set of all things that are more similar to a fixed "paradigmatical" red object than this is to another fixed "foil" non-red object (cf. left picture) isn't satisfactory, since the degree of overall similarity, including e.g. shape, weight, will afford little evidence of degree of redness. (In the picture, the yellow paprika might be considered more similar to the red one than the orange.)
   Daylight has a spectrum similar to that of a black body with a correlated color temperature of 6500 K (D65 viewing standard) or 5500 K (daylight-balanced photographic film standard).
  
  For colors based on black-body theory, blue occurs at higher temperatures, whereas red occurs at lower temperatures. This is the opposite of the cultural associations attributed to colors, in which "red" is "hot", and "blue" is "cold".
  
  Section::::Applications.
  
  Section::::Applications.:Lighting.
   Newton's law of cooling is an empirical relationship attributed to English physicist Sir Isaac Newton (1642 - 1727). This law stated in non-mathematical form is the following:
  
  Or, using symbols:
  
  An object at a different temperature from its surroundings will ultimately come to a common temperature with its surroundings. A relatively hot object cools as it warms its surroundings; a cool object is warmed by its surroundings. When considering how quickly (or slowly) something cools, we speak of its "rate" of cooling - how many degrees' change in temperature per unit of time.
   A red star could be a tiny red dwarf, a star of feeble energy production and a small surface or a bloated giant or even supergiant star such as Antares or Betelgeuse, either of which generates far greater energy but passes it through a surface so large that the star radiates little per unit of surface area. A star near the middle of the spectrum, such as the modest Sun or the giant Capella radiates more energy per unit of surface area than the feeble red dwarf stars or the bloated supergiants, but much less than such a white or blue star as Vega or Rigel.
   BULLET::::3. Deane B. Judd published a paper on the nature of "least perceptible differences" with respect to chromatic stimuli. By empirical means he determined that the difference in sensation, which he termed ΔE for a "discriminatory step between colors ... "Empfindung"" (German for sensation) was proportional to the distance of the colors on the chromaticity diagram. Referring to the (r,g) chromaticity diagram depicted aside, he hypothesized that
   BULLET::::- If two objects have the same mass, and we heat one of them up from an external source, does the heated object gain mass? If we put both objects on a sensitive enough balance, would the heated object weigh more than the unheated object? Would the heated object have a stronger gravitational field than the unheated object?
   In the infrared panel, the colors reflect what our eyes might see if we could retune them to the invisible, infrared portion of the light spectrum. The hot star is less bright in infrared light than in visible and appears fainter. The warm planet peaks in infrared light, so is shown brighter. Their hues represent relative differences in temperature. Because the star is hotter than the planet, and because hotter objects give off more blue light than red, the star is depicted in blue, and the planet, red.
   BULLET::::- The dominant frequency (or color) range of the emitted radiation shifts to higher frequencies as the temperature of the emitter increases. For example, a "red hot" object radiates mainly in the long wavelengths (red and orange) of the visible band. If it is heated further, it also begins to emit discernible amounts of green and blue light, and the spread of frequencies in the entire visible range cause it to appear white to the human eye; it is "white hot". Even at a white-hot temperature of 2000 K, 99% of the energy of the radiation is still in the infrared. This is determined by Wien's displacement law. In the diagram the peak value for each curve moves to the left as the temperature increases.
   For artists, most pigments and papers have a cool or warm cast, as the human eye can detect even a minute amount of saturation. Gray mixed with yellow, orange, or red is a “warm gray”. Green, blue, or purple create “cool grays”. Note that this sense of temperature is the reverse of that of real temperature; bluer is described as “cooler” even though it corresponds to a higher-temperature black body.
   Stars increase in luminosity as they age, and a more luminous star needs to radiate energy more quickly to maintain equilibrium. Stars larger than red dwarfs do this by increasing their size and becoming red giants with larger surface areas. Rather than expanding, however, red dwarfs with less than 0.25 solar masses are predicted to increase their radiative rate by increasing their surface temperatures and becoming "bluer" (spectral class O). This is because the surface layers of red dwarfs do not become significantly more opaque with increasing temperature.
   Temperature would have been controlled by testing of firing materials, the size, shape, and material of the kiln, and the control of the environment. Technology for achieving and maintaining high temperatures would have been known from metal and ceramic production e.g. the potential use of twin bellows as used in metal production.
  
  Section::::Origins.
  
  Section::::Origins.:Han blue and Egyptian blue.
   and a white dwarf star is eventually born, the ember of the expired MS star. Temperatures of a new-born white dwarf may be in the hundreds of thousand kelvin, but if the mass of the white dwarf is less than just a few solar masses, burning of He to C and O is not possible and the star will slowly cool down forever. The coolest white dwarfs observed have temperatures of roughly 4000 K, which must mean that the universe is not old enough so that lower temperature stars cannot be found. The emission spectra of "cool" white dwarfs does not at all look like a Planck blackbody spectrum. Instead, nearly the whole infrared is attenuated or missing altogether from the star's emission, owing to CIA in the hydrogen-helium atmospheres surrounding their cores.
   For a visual experience of natural convection, a glass filled with hot water and some red food dye may be placed inside a fish tank with cold, clear water. The convection currents of the red liquid may be seen to rise and fall in different regions, then eventually settle, illustrating the process as heat gradients are dissipated.
  
  Section::::Newton's law of cooling.
  
  Convection-cooling is sometimes loosely assumed to be described by Newton's law of cooling.
   The color of a radiating black-body tells the temperature of its radiating surface. It is responsible for the color of stars, which vary from infrared through red (2,500K), to yellow (5,800K), to white and to blue-white (15,000K) as the peak radiance passes through those points in the visible spectrum. When the peak is below the visible spectrum the body is black, while when it is above the body is blue-white, since all the visible colors are represented from blue decreasing to red.
  
  Section::::Discovery.
   Perplexed, both Red and Blue flew to Antarctica to see if Kryptonian technology could solve the issue, but were met by a woman named Obsession, who had previously shown an incredible level of romantic lust for Superman. Then Maxima, another superpowered female admirer of Superman's (only this one was far more volatile), stepped in. While Obsession liked the idea of two Supermen, Maxima found the existence of two utterly unacceptable. A fight broke out between the women when Obsession offered to share them with the Amazon from Almerac, insulting Maxima's royal sensibilities. Superman Red and Superman Blue separated and reprimanded the combatants.
   Brown dwarfs, whose energy comes from gravitational attraction alone, cool as they age and so progress to later spectral types. Brown dwarfs start their lives with M-type spectra and will cool through the L, T, and Y spectral classes, faster the less massive they are; the highest-mass brown dwarfs cannot have cooled to Y or even T dwarfs within the age of the universe. Because this leads to an unresolvable overlap between spectral types effective temperature and luminosity for some masses and ages of different L-T-Y types, no distinct temperature or luminosity values can be given.
   During acquisition, the CS and US are paired as described above. The extent of conditioning may be tracked by test trials. In these test trials, the CS is presented alone and the CR is measured. A single CS-US pairing may suffice to yield a CR on a test, but usually a number of pairings are necessary and there is a gradual increase in the conditioned response to the CS. This repeated number of trials increase the strength and/or frequency of the CR gradually. The speed of conditioning depends on a number of factors, such as the nature and strength of both the CS and the US, previous experience and the animal's motivational state. The process slows down as it nears completion.
   By the second law of thermodynamics, heat will flow from hotter bodies to adjacent colder bodies, in proportion to the difference of temperature and of the thermal conductivity of the material between them. When heat flows into (or out of) a material, its temperature increases (respectively, decreases), in proportion to the amount of heat divided by the amount (mass) of material, with a proportionality factor called the specific heat capacity of the material.
   Notice that a gray (flat spectrum) ball where formula_48 comes to the same temperature as a black body no matter how dark or light gray .
  
  Section::::Temperature relation between a planet and its star.:Effective temperature of Earth.
  
  Substituting the measured values for the Sun and Earth yields:
  
  With the average emissivity formula_53 set to unity, the effective temperature of the Earth is:
  
  or −18.8 °C.
   Any hot object transfers heat to its cooler surroundings, until everything is at the same temperature. For two objects at the same temperature as much heat flows from one body as flows from the other, and the net effect is no change. If the universe were infinitely old, there must have been enough time for the stars to cool and warm their surroundings. Everywhere should therefore be at the same temperature and there should either be no stars, or everything should be as hot as stars.
   When the star's or planet's net emissivity in the relevant wavelength band is less than unity (less than that of a black body), the actual temperature of the body will be higher than the effective temperature. The net emissivity may be low due to surface or atmospheric properties, including greenhouse effect.
  
  Section::::Star.
   Although the two types of diagrams are similar, astronomers make a sharp distinction between the two. The reason for this distinction is that the exact transformation from one to the other is not trivial. To go between effective temperature and color requires a color–temperature relation, and constructing that is difficult; it is known to be a function of stellar composition and can be affected by other factors like stellar rotation. When converting luminosity or absolute bolometric magnitude to apparent or absolute visual magnitude, one requires a bolometric correction, which may or may not come from the same source as the color–temperature relation. One also needs to know the distance to the observed objects ("i.e.", the distance modulus) and the effects of interstellar obscuration, both in the color (reddening) and in the apparent magnitude (where the effect is called "extinction"). Color distortion (including reddening) and extinction (obscuration) are also apparent in stars having significant circumstellar dust. The ideal of direct comparison of theoretical predictions of stellar evolution to observations thus has additional uncertainties incurred in the conversions between theoretical quantities and observations.
  
raw_presuppositions: Objects will be different temperatures depending on the objects color.  Blue and red objects become hotter based off of their colors.  Blue and red objects become hotter based off of their colors. 
raw_corrections: Objects will be different temperatures depending on light frequency.   While colors do make a difference in an objects heat capabilities, many factors such as light frequencies play a big role too.  While colors do make a difference in an objects heat capabilities, many factors such as light frequencies play a big role too. 