As we have three cones used to observe tone and colour, the colour/tone of something occupies a 3D space.
However, as you say, a pigment colour has high dimensional properties - the spectral response. As others have mentioned this determines how it impacts on the observed/perceived colour, depending in the spectral response of the light it reflects.
However, as you say, a pigment colour has high dimensional properties - the spectral response. As others have mentioned this determines how it impacts on the observed/perceived colour, depending in the spectral response of the light it reflects.