Three stars $A, B, C$ have surface temperatures $T_{\mathit{A}},\mathit{ }{T}_{\mathit{B}},T_{\mathit{C}}\mathit{ }$ respectively. Star A appears bluish, star $B$ appears reddish and star $C$ yellowish. Hence,

Stars approximate black body radiators and their visible colour depend upon the temperature of the radiator. The curves show blue, white, and red stars. The white star is adjusted to $5270 \mathrm{K}$ so that the peak of its blackbody curve is at the peak wavelength of the sun, $550 \mathrm{nm}$. From the wavelength at the peak, the temperature can be deduced from the Wien displacement law. 

$T_{\mathit{A}}>T_{\mathit{C}}>T_{\mathit{B}}$