What is the visible colors of light has the longest wavelength?

The question is unclear. Here is the clear question:

Which color of visible light has the longest wavelength?

Red

Explanation:

The visible light also known as white light comprises of different colors. The colors are;

1-  Red

2- Orange

3- Yellow

4- Green

5- Cyan

5- Blue

6- Violet

Each color has a frequency and wavelength associated with it.

Note that the minimum the frequency the higher the wavelength.

Below are the ranges of wavelength of these colors in nanometer (nm)

Red         625–740 nm

Orange590–625 nm

Yellow565–590 nm

Green500–565 nm  

Cyan485–500 nm

Blue450–485 nm

Violet380–450 nm

According to this Red has the highest wavelength and smallest frequency.

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