subdued
sub-dued
adjective
Quiet, reflective, or slightly depressed in mood or manner.
"He was unusually subdued after the meeting."
adjective
Less intense, bright, or loud than usual; restrained.
"The room had a subdued, calming atmosphere."
Thesaurus
Synonyms: dull, soft, tame, low-key, restrained, low-keyed, dim, dark, quiet, hushed, muted