Same entry, according to Adler, in the Ambrosian Lexicon (1991).
Neuter nominative/accusative singular of these adjectives. The headword one must be quoted from somewhere but is far too common to track down.
For 'red' cf. e.g. epsilon 3097, and for this 'red' = 'dark' (rather than 'black') equivalence see already epsilon 3092.