i say this because red, orange, yellow dwarfs and other stars aren't their literal name colour as red dwarfs will appear most often as a white tinted red which is also pretty much orange, orange dwarfs appear a warm, yellowish white and yellow dwarfs appear mostly or completely white as well as the fact that in MK classification apart from MKGFABO theres also inbetweens, for example ...->K9->K0->G9->G0->...
look at the planckian locus, it is a line in a colour dpace which represents the wavelength of light emitted by a black body at different temperatures and can be applied to stars since its pretty much just the colour they take depending on temperature