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