The Allen and Greenough is still under construction;
so some links may not work quite the way you would expect.
Dative with Adjectives.
383. The Dative is used after Adjectives or Adverbs,
to denote that to which the given quality is directed, for which it
exists, or towards which it tends.
NOTE: The dative with certain adjectives is in origin a Dative
of Purpose or End.