candor

noun3

1. •
   The state of being sincere and open in speech; honesty in expression.
2. •
   Impartiality.
3. •
   (no longer used) Whiteness; brilliance; purity.

   • Whilst thou didst keep thy Candor undefil'd, Deerly I lov'd thee; as my first-born child[…] — 1648