This hue is inspired by living coral, whose vibrant shades of pink, orange, and red come from symbiotic algae called zooxanthellae. These microscopic organisms live within coral tissue, providing both color and energy through photosynthesis. The coral’s brightness tends to intensify in shallow, sunlit waters where the algae thrive. When coral becomes stressed—often due to rising ocean temperatures—it expels the algae, revealing a pale white skeleton beneath.