mut‧ed [usually before noun]
muted sounds, voices etc are quieter than usual [= subdued]:
Everyone was sitting round discussing the accident in muted voices.
a muted reaction to something is not expressed strongly:
There was muted agreement from most of the people in the room.
The speech received only a muted response from the unions.
a muted colour or light is soft and gentle, not bright:
muted pinks and blues
a muted musical instrument has been made to sound softer