Your goal is to find the secret four-color code. The following colors are possible: red, brown, black, purple, blue, white.
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', 'blue', 'brown', 'black']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['red', 'red', 'purple', 'blue']. Hint: three colors are in the correct positions.
Guess: ['red', 'purple', 'purple', 'white']. Hint: two colors are in the correct positions and one color is in the secret code but in the wrong positions.
A B C D
blue, black, purple, red purple, blue, blue, red red, white, purple, blue white, white, black, brown