Which color scheme did NASA specifically develop for space imagery that has since become widely adopted in retail marketing for astronomy and space-themed products?

Space exploration and astronomical discoveries have inspired countless retail products and marketing strategies. Companies leverage the allure of the cosmos to create memorable brand experiences and drive consumer interest. This poll tests your knowledge of how astronomy has influenced retail marketing and product development in the commercial space sector.

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The "Hubble Palette" (blue for oxygen, green for hydrogen, red for sulfur)
The "Apollo Spectrum" (gold for solar reflection, blue for Earth view, white for lunar surface)
The "Cosmic Gradient" (purple for deep space, teal for nebulae, orange for stellar formations)
The "Voyager Palette" (red for distant planets, yellow for stars, green for cosmic radiation)