What is the difference in temperature between a star that is bluish white and a star that is red?

What is the difference in temperature between a star that is bluish white and a star that is red? Thanks in advance!|||Figure 2 in the source link is very informative. Roughly 26000 degrees difference. (metric degrees. K or C, doesn't matter in this case as the degree increment is the same)|||This isn't enough information to make a conclusion here because even a slight change in contrast of color can make a difference in temperature. However, the basic answer is that redish stars are absolutely cooler (but not always older). This is why it is tough to answer this question. I'll stick with two examples on the main sequence since their the easiest to compare:





Redish star: Proxima Centauri-Distance is about 4.2 light years; smaller diameter than sun; M5 classification, about 3,000 kelvin.





Bluish white: Sirius-Distance is about 8 light years; slightly larger than sun; A1 classification; almost 10,000 kelvin.





Therefore, there is about a 7,000 kelvin difference. When you get to dwarf, giants, and supergiants, it is harder to compare because there are other factors do apply, although it is the same principle.|||The 5000C (or 5000K) might be considered correct.



Look at the colors shown in the stellar classification chart found here: http://en.wikipedia.org/wiki/Stellar_cla鈥?/a>



[Ignore their color error for the Sun; this is a hiccup that is slow to cure.]



Color will vary a little between observers, especially on the red end, based on my limited experience with this. I do not see any truly red stars, but see orange or redish orange stars. [Perhaps some carbon stars would change my opinion, admittedly]|||* Red


o Just visible: 525 掳C (977 掳F)


o Dull: 700 掳C (1,292 掳F)


o Cherry, dull: 800 掳C (1,470 掳F)


o Cherry, full: 900 掳C (1,650 掳F)


o Cherry, clear: 1,000 掳C (1,830 掳F)


* Orange


o Deep: 1,100 掳C (2,010 掳F)


o Clear: 1,200 掳C (2,190 掳F)


* White


o Whitish: 1,300 掳C (2,370 掳F)


o Bright: 1,400 掳C (2,550 掳F)


o Dazzling: 1,500 掳C (2,730 掳F)|||About 5000 degrees celsius.|||18000 degree K for white bluish to 2500 degree for red stars.