1) Conquered 2) Gentle 3) Hushed 4) In a softened tone 5) Inhibited 6) Lacking in light 7) Low-key 8) Muffled 9) Muted 10) Not bright or harsh 11) Not brilliant or glaring 12) Quiet 13) Repressed 14) Soft 15) Wallpaper in subdued greens Found on https://www.crosswordclues.com/clue/subdued
Sub·dued' adjective 1. Conquered; overpowered; crushed; submissive; mild. 2. Not glaring in color; soft in tone. Found on http://www.encyclo.co.uk/webster/S/221
quiet; inhibited; repressed; controlled: After the argument he was much more subdued. · lowered in intensity or strength; reduced in fullness of tone, as a color or voice; muted: subdued light; wallpaper in subdued greens. · (of land) not marked by any striking features, as mountains or cliffs: a subdued landscape. Found on https://www.infoplease.com/dictionary/subdued