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