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