Bible Dictionaries
True-Blue

Webster's Dictionary

(1):

(a.) Of inflexible honesty and fidelity; - a term derived from the true, or Coventry, blue, formerly celebrated for its unchanging color. See True blue, under Blue.

(2):

(n.) A person of inflexible integrity or fidelity.

Bibliography Information
Webster, Noah. Entry for 'True-Blue'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/true-blue.html. 1828.