This phrase is a bit of a riddle or a play on words. It's likely referring to something that has changed color dramatically, but it's still technically considered to be "colored" even though it's not its original color.
Here are some examples of what the phrase could be referring to:
* A piece of paper that has been written on with ink. The paper was originally white, but now it has black ink on it. However, it's still considered colored because it's no longer just white.
* A person's hair that has turned gray. The hair was originally a darker color, but now it's gray. It's still technically colored, even though it's no longer the original color.
* A fruit that has ripened. Some fruits start out green and then turn red, purple, or another color as they ripen.
The specific context of the phrase will help determine the exact meaning.