Colors RGB and RGBA - W3Schools
https://www.w3schools.com/colors/colors_rgb.asp
WEBAn RGB color value is specified with: rgb ( red, green, blue) Each parameter (red, green, and blue) defines the intensity of the color with a value between 0 and 255. For example, rgb (255, 0, 0) is displayed as red, because red is set to its highest value (255), and the other two (green and blue) are set to 0.
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