Which publishing house is famously associated with orange as its primary brand color, featuring this distinctive hue on the spines of its classic literature series?

Publishing houses have carefully crafted brand identities over decades, with their distinctive color palettes becoming as recognizable as the literary voices they promote. These colors appear on book spines, websites, and marketing materials, creating immediate brand recognition among avid readers and industry insiders. How well do you know the signature colors that represent the most influential publishing houses in literature?

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Penguin Books
HarperCollins
Simon & Schuster
Oxford University Press