harmonious

Adjective

• existing together in harmony
  • harmonious family relationships
    

• suitable and fitting
  • the tailored clothes were harmonious with her military bearing
    

• exhibiting equivalence or correspondence among constituents of an entity or between different entities

• musically pleasing

Related words

• Synonyms: 
  proportionate , symmetrical
• Antonyms: 
  inharmonious , unharmonious