colourless vs somber

colourless and somber both are adjectives.

Word	Noun	Adjective	Verb	Adverb
colourless	No	Yes	No	No
somber	No	Yes	No	No

colourless (adjective)	somber (adjective)
weak in color; not colorful	lacking brightness or color; dull
lacking in variety and interest	grave or even gloomy in character