What is the name of a caterpillar that is light purple with two pink stripes down its back?

A caterpillar that has two colors is called a two tone caterpillar, but when it becomes a butterfly it will only have one color this reaction results in lack of time in a cocoon because a caterpillar that is two odd colors like ,brown and yellow, will have less time in a cocoon.

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I am not at all certain that the above is true .... can someone improve this answer (fwmh)