Since the word "yellow" already indicates a color, is it necessary to mention "color" in this context?

Native speaker’s answer
Rebecca
Good point! It may sound a bit redundant to use "-colored" here, as "yellow" is a color. You can say "yellow plant" here without changing the meaning of the sentence! However, the emphasis of color might be important to the speaker, so they might have used "yellow-colored plant" here to emphasize the color yellow specifically. Ex: A: I spy with my little eye something red. B: Look, a red-colored bird! C: Look, a red bird!