harmonious
har-mo-ni-ous
adjective
Forming a pleasing or consistent whole; free from disagreement or conflict.
"The harmonious colours created a calming atmosphere."
Thesaurus
Synonyms: compatible, congruent, congruous, pure, harmonised, consonant, on-key, symphonious, sympathetic, symphonic, harmonic, harmonized
Antonyms: inharmonious, unharmonious