Which color is LEAST commonly used as a primary brand color among major natural and organic product companies?

The natural products industry employs specific color psychology to connect with environmentally-conscious consumers. Brand colors aren't random choices but calculated decisions that communicate sustainability, purity, and eco-friendliness. This poll tests your knowledge of how major environmental and natural product brands leverage color theory in their marketing strategies to build trust and recognition in an increasingly competitive marketplace.

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Green (representing nature, sustainability, and growth)
Brown (representing earth, natural materials, and reliability)
Purple (representing luxury, creativity, and spirituality)
Blue (representing clean water, sky, and trustworthiness)