Emoji doesnt substitute the letters

[TheDarkKnight69]

Whatever be the guess, the letters do not get substituted, it always stays gray.
My code snippet is:
`def generate_colored_words(guess: str, answer: str) -> str:
"""Return string of emojis with the letter colored"""
colored_word = [EMOJI_CODES["grey"][letter] for letter in guess]
answer_letters = list(answer)
guess_letters = list(guess)
#change letter to green if same letter and same place
for i in range(len(guess_letters)):
if guess_letters[i] == answer_letters[i]:
colored_word[i] == EMOJI_CODES["green"][guess_letters[i]]
answer_letters[i] = None
guess_letters[i] = None
#change letter to yellow if same letter and different place
for i in range(len(guess_letters)):
if guess_letters[i] is not None and guess_letters[i] in answer_letters:
colored_word[i] == EMOJI_CODES["yellow"][guess_letters[i]]
answer_letters[answer_letters.index(guess_letters[i])] = None
return "".join(colored_word)

def update_embed(embed: nextcord.Embed, guess : str):
puzzle_id = int(embed.footer.text.split()[1])
answer = popular_words[puzzle_id]
colored_word = generate_colored_words(guess, answer)
empty_slot = generate_blanks()
embed.description = embed.description.replace(empty_slot, colored_word, 1)
return embed
`