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