nicety

(noun) conformity with some esthetic standard of correctness or propriety. Synonyms: justness, rightness. Example: "It was performed with justness and beauty."

(noun) a subtle difference in meaning or opinion or attitude. Synonyms: nuance, shade, subtlety, refinement. Examples: "Without understanding the finer nuances you can't enjoy the humor." "Don't argue about shades of meaning."