It is an orange giant with a spectral class of K3....
It's not clear what specifically is being referred to as "bcentauri" here. There are three "best" candidates, in my opinion:Beta Centauri is a blue-white giant, spectral class B1.Alpha Centauri B is an orange dwarf, spectral class K1.B Centauri (which would be the leading candidate if it weren't a fairly dim and obscure visual 4th magnitude star) is an orange giant, spectral class K3.The spectral color is slightly different than the "true" color: the Sun is a "yellow dwarf", spectral class G2, but is actually white (sunlight is white more or less by definition, since it's what our eyes are designed for). Similarly, Alpha Centauri B is "really" a pale yellowish-orange, and B Centauri is just slightly more on the orange side than that.
The color of the star Indicates its Temperature.
the color of the star regulus is blue-white
the color of the star regulus is blue-white
The color of Bernard's the star is red.
The hotter the star, the closer to white the color.
the color of a young star is *bluish white*
Cursa is a blue star with a B-V color index of -0.19, indicating a bluish-white color.
Bernard's star is an old red dwarf star and is the fourth closest star to the Sun. It is the color of red.
The CRF Star is typically white in color.
The star Alphard appears reddish in color.
The color of a star is a good indicator of its temperature.