sombre, cheerless, colorless, uncheerful, colourless, sober, drab, solemn, mournful, gloomy, more...

lighthearted, cheerful, happy, jolly, joyful

dreary, gloomy, melancholy, sad, unhappy, more...

little, more, same, own, first, unrelievedly, usual, old, real, deep

a little sad,   dark tone,   a little bit sad,   quiet sad,   grave tone,   not festive,   dark color or tone,   funeral like,   less festive,   solemn and sad