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carol.gimp.orgGIMP 2.2star colors |
Back in the good old days when we took photographs on film and had that film chemically developed and then printed on paper, it was a well known fact among amateur astronomers that brand of film tended to display more red and the other tended to display more blue. The stars have been photographed and color analysed for as long as any other set of colors; perhaps they are even the origin of the science ....
I started to search the web for what I knew must exist, a table of star colors and their r,g,b equivelent. I found: monitor calibration issues. All of the colors used to make TheGIMP resources found on this page came from this excellent web site called What color are the stars? where, if you poke around a bit, the author helps to debunk several RGB representations of blackbody color curves. Color is a problem.
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Star ColorsAstronomers have been classifying stars by color since long before I learned about it in the mid-1980's. OBAFGKM. This is a GIMP Palette and a GIMP Gradient of those colors. 
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Nearby StarsA fun palette of the colors of the Nearby Stars. |
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Familiar StarsOnce I read an article in Sky and Telescope about how you can get photographs of the real color of stars without too much fancy equipment. You need a camera which allows you to leave the shutter open remotely via shutter cable and that has a manually adjustable focus. Set your camera up to photograph star trails and then in regular time intervals, like every 5 minutes or so, bump the camera a little out of focus. At each new time interval the sharp line of the original star trail will become blurry and diffused. Spreading the light across the image like that will show the stars true color. This is a palette of how those colors should display on your computer screen with a white point of D65. Now you just need to figure out what your camera and/or film did to the color. |
Sun ColorsPerhaps the most interesting set of colors on this page; this palette and gradient show some of the different shades of lighting that might be affecting your monitor display. Inaccurately named Sun Colors, only three of the five colors are shades of sunlight. 
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GIMP Palette
Name: Sun Colors
Columns: 5
#
255 243 234 Sun above atmosphere
255 241 230 5770 K blackbody (a Sun approximation)
255 255 255 Illuminant D65 (daylight, standard)
255 235 205 Illuminant D50 (bright incandescent light)
255 191 170 Illuminant B ("direct sunlight")
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