*** NameError: name 'red' is not defined

Question

import random

colors = ["white" , "black" , "red" , "green" , "blue" , "yellow" , "purple" , "grey"]

while True:
        color = colors[random.randint(0,len(colors)-1)]
        guess = input("I'm thinking about a color, can you guess it: ")

while True:
        if (color == guess.lower()):
                break
        else:
                guess = input("Nope. Try again: ")

        print("You guessed it! I was thinking about", color)

        play_again = input("Lets pllay again? Type 'no' to quit.")

        if play_again.lower() == 'no':
                break

        print("It was fun playing!")

Answer 1

***NameError: name 'red' is not defined

The code you shared has no such error.

However, it has wrong indentations.

I've fixed the indentation so it should work right now:

import random

colors = ["white" , "black" , "red" , "green" , "blue" , "yellow" , "purple" , "grey"]

while True:
    color = colors[random.randint(0,len(colors)-1)]
    guess = input("I'm thinking about a color, can you guess it: ")

    while True:
        if (color == guess.lower()):
            break
        else:
            guess = input("Nope. Try again: ")

    print("You guessed it! I was thinking about", color)
    play_again = input("Lets pllay again? Type 'no' to quit.")
    if play_again.lower() == 'no':
        break

print("It was fun playing!")

Answer 2

No error within the code, however, there is a multiple Indentation errors. fix the indents. Also, I suggest adding the colors you can guess from so the user knows what colours there are.