despite the denials otherwise, The Little Mermaid was, in fact, written specifically as being white with blue eyes

Skin

Whenever a cloud-like shadow swept across them, she knew that it was either a whale swimming overhead, or a ship with many human beings aboard it. Little did they dream that a pretty young mermaid was down below, stretching her white arms up toward the keel of their ship.

Lowering her gaze, she saw that her fish tail was gone, and that she had the loveliest pair of white legs any young maid could hope to have. But she was naked, so she clothed herself in her own long hair.

Graceful slaves now began to dance to the most wonderful music. Then the little mermaid lifted her shapely white arms, rose up on the tips of her toes, and skimmed over the floor. No one had ever danced so well.

Then her sisters rose to the surface, looked at her sadly, and wrung their white hands. She smiled and waved, trying to let them know that all went well and that she was happy.

A hush came over the ship. Only the helmsman remained on deck as the little mermaid leaned her white arms on the bulwarks and looked to the east to see the first red hint of daybreak, for she knew that the first flash of the sun would strike her dead.

Eyes

They were six lovely girls, but the youngest was the most beautiful of them all. Her skin was as soft and tender as a rose petal, and her eyes were as blue as the deep sea, but like all the others she had no feet. Her body ended in a fish tail.

The Prince asked who she was, and how she came to be there. Her deep blue eyes looked at him tenderly but very sadly, for she could not speak.

Hair

No mention of red. Just "long."

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