Yes, the blue stars show that the surface temperature of the stars is higher, generally above 20,000-30,000 degrees, and the surface of the sun is only 6,000 degrees. This is because the pressure and temperature produced by massive stars are much higher than those of ordinary stars, because the super gravity produced by the core of massive stars makes the nuclear fusion reaction proceed at a very high speed.
Therefore, the radiation emitted by massive stars, including visible light, infrared ray, ultraviolet ray, X ray, gamma ray and stellar wind (solar wind), is far stronger than that of ordinary stars.