Simple past tense and past participle of colourize.(verb)
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Use "colourized" in a sentence
"Then Marvel brought out the first colourized manga - Akira, and First Comics - Lone Wolf and Cub."
"I refused to buy the first season of Bewitched because it was released as a colourized version."
"Sony's Columbia TriStar home-video unit is releasing two Three Stooges DVDs that allow viewers to watch the original black-and-white or digitally colourized versions."