Changing to a different fixed color space is unlikely to help. However adding a learnable color space transformation is a great (and rarely known) trick. Both a

Changing to a different fixed color space is unlikely to help. However adding a learnable color space transformation is a great (and rarely known) trick. Both are discussed and compared in this terrific paper: https://arxiv.org/abs/1606.02228 https://arxiv.org/abs/1606.02228