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All behind a 'diffuser'.
You can send different independent voltages to each chip and diffuse different intensities of those three colors to create any color.
And the different intensities you see here, are probably because of the variable thickness of the shell, or the bundle of light that has bounced off the shell, making it go different ways thus 'filtering' certain colors.
RGB
Mr. Ree,
Red, blue and yellow are paint primary colours. Red, green and blue are light primary colours.
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