Well, #ff0000 is the definition of "red" within the RGB colorspace, corresponding to the full brightness of the "red" (only) pixel components, constrained by your monitor's limited reproduction gamut.
So yeah, it's "red". But it's not the color of anything that has ever been viewed by humans in real life (except itself). There are few pure colors in nature anyway, but you can talk about "red" being wavelength of the center of the "reddish" range of the visible light spectrum.
Of course, names for colors are always subjective. Crayola might be the best universal reference. Crayola red bears little resemblance to #ff0000, even discounting the pigment vs. light mixing and perception differences.
But you have to call it something, right? So #ff0000 is "pure red, RGB, luminous". :)
So yeah, it's "red". But it's not the color of anything that has ever been viewed by humans in real life (except itself). There are few pure colors in nature anyway, but you can talk about "red" being wavelength of the center of the "reddish" range of the visible light spectrum.
Of course, names for colors are always subjective. Crayola might be the best universal reference. Crayola red bears little resemblance to #ff0000, even discounting the pigment vs. light mixing and perception differences.
But you have to call it something, right? So #ff0000 is "pure red, RGB, luminous". :)