Your goal is to find the secret four-color code. The following colors are possible: black, green, purple, brown, yellow, blue.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['purple', 'yellow', 'black', 'brown']. Hint: two colors are in the correct positions.
Guess: ['black', 'black', 'brown', 'brown']. Hint: none of the guessed colors are present in the secret code.
Guess: ['green', 'green', 'purple', 'purple']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['purple', 'yellow', 'green', 'yellow']. Hint: three colors are in the correct positions.
A B C D
green, yellow, purple, green purple, blue, green, purple purple, yellow, green, blue blue, blue, blue, purple