Converts an RGB color value to its closest named color.
color_name = rgb_to_name(color)
Get the name of the color white
rgb_to_name(0xFFFFFF); // returns "White"
Get the name of the color black
rgb_to_name(0x000000); // returns "Black"
Get the name of the color red
rgb_to_name(0xFF0000); // returns "Red"
Get the name of a medium gray
rgb_to_name(0x808080); // returns
Get the name of a light blue color (RGB: 173, 216, 230)
rgb_to_name(0xADD8E6); // returns