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A rainbow has so many colors they blend into each other.

A rainbow has so many colors they blend into each other.

We often name seven colors in a rainbow. But there are really countless shades melting together.

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A rainbow always shows its colors in the same order. A rainbow always shows its colors in the same order. Red, yellow, and blue are called primary colors. Red, yellow, and blue are called primary colors. The sky looks blue because sunlight bounces around in the air. The sky looks blue because sunlight bounces around in the air. Green leaves and grass get their color from a helper called chlorophyll. Green leaves and grass get their color from a helper called chlorophyll. Wearing white on a hot day helps keep you cooler than black. Wearing white on a hot day helps keep you cooler than black.