looks similar to "Near-optimal rotation of colour space by zebrafish cones in vivo" https://www.biorxiv.org/content/10.1101/2020.10.26.356089v1 https://www.bio

looks similar to "Near-optimal rotation of colour space by zebrafish cones in vivo" https://www.biorxiv.org/content/10.1101/2020.10.26.356089v1 https://www.biorxiv.org/content/10.1101/2020.10.26.356089v1 "Our findings reveal that the specific spectral tunings of the four cone types near optimally rotate the encoding of natural daylight in a principal component analysis (PCA)-like manner to yield one primary achromatic axis, two colour-opponent axes as well as a secondary UV-achromatic axis for prey capture."