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