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