JavaScript code at the client side sends the color data in text format, as a hexadecimal number, starting with a '#' sign.
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        Each color is a 10-bit number, so in total, it gives us a 30-bit number for the RGB value.
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        When the rainbow function is enabled, JavaScript sends an 'R' character, and when it's disabled, it sends a 'N' character. 
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        Let's take a look at the HTML