In recent years the development and design of multispectral color image acquisition devices has received great attention from the color scientific community. And the use of these multispectral devices has grown dramatically to achieve different purposes. Here we tackle the optimal design of a polyvalent three-channel multispectral system, with three channels, which would be able to reconstruct the spectral reflectances of objects to be imaged and the spectral power distribution of the illumination, as well as to provide illuminant invariant descriptors.To achieve the optimal design of such a polyvalent multispectral device we test different spectral sensitivity of the different channels.