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