original: Hydra appears to be spectrally neutral like Charon and Nix, though Pluto is reddish.
simplifications: Hydra appears to be spectrally neutral like Charon and Nix. Hydra is neutral in color like Charon and Nix, though Pluto is reddish. Hydra looks to be spectrally neutral, like Charon and Nix. However, Pluto is reddish. Hydra appears to be spectrally neutral like Charon and Nix. Pluto is reddish. Hydra seems to be grey like Charon and Nix. Hydra appears to be spectrally neutral. Hydra looks to be spectrally neutral like Charon and Nix. Pluto is red colored. Hydra is spectrally neutral like Charon and Nix even though Pluto is reddish. Hydra appears to look neutral like Charon and Nix, however Pluto is reddish in color. Hydra, Charon, and Nix are neutral. Pluto is reddish.