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