Flame-colored is typically associated with hues of orange, yellow, and red. Antonyms for flame-colored may include shades such as blue, green, purple or any other cool color that is opposite on the color wheel. Coal-colored, ash-colored, and black can also be antonyms for flame-colored as they are the absence of bright colors. Some other antonyms for flame-colored may include pale, pastel, and muted colors. Neutral colors like beige, gray, and white can also act as antonyms for flame-colored since they do not have the same fiery intensity.