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