Isabella \Is`a*bel"la\, n., Isabella color \Is`a*bel"la col"or\
[Said to be named from the Spanish princess Isabella,
daughter of king Philip II., in allusion to the color assumed
by her shift, which she wore without change from 1601 to
1604, in consequence of a vow made by her.]
A brownish yellow color.
[1913 Webster]