Hi, what do you want to do?
CK-12 Foundation
Ck 12: Earth Science: Star Classification
[Free Registration/Login may be required to access all resource tools.] How a star is classified according to color and temperature.
CK-12 Foundation
Ck 12: Earth Science: Star Classification
[Free Registration/Login may be required to access all resource tools.] How a star is classified according to color and temperature.
University of Oregon
Determining Properties of Stars
An excellent website detailing how a star's properties can be determined, and how these properties lead to the way a star is classified.
Other
Sky Server: Color
SkyServer answers why stars have different colors and shows what you can learn by studying the colors of stars, galaxies, and other objects.