What is an antonym for somber?

Here are some antonyms for somber, depending on the specific context:

General Antonyms:

* Cheerful

* Joyful

* Happy

* Merry

* Bright

* Lighthearted

* Lively

* Animated

* Jubilant

* Ebullient

More Specific Antonyms:

* Optimistic (for a mood or outlook)

* Hopeful (for a feeling)

* Vibrant (for color or atmosphere)

* Playful (for a tone)

* Whimsical (for a feeling)

* Celebratory (for an occasion)

The best antonym will depend on the specific meaning and context of "somber" in your sentence.