Here's why:

* Color and Temperature: The color of a star is directly related to its surface temperature. Hotter stars emit more blue light, while cooler stars emit more red light.

* Spectral Classification: Stars are classified by their spectral type, which is determined by their temperature and the elements they contain. A 6000 degree Celsius star would fall into the G spectral class, which is the same class as our Sun.

* Sun's Color: Our Sun appears yellowish-white, but it actually emits most of its energy in the green part of the spectrum. However, our eyes perceive the combined spectrum as yellowish-white.

Therefore, a star with a surface temperature of 6000 degrees Celsius would have a similar color to our Sun - a yellowish-white hue.