Converts an RGB color value to its corresponding hue component in the HSL color space.
hue = rgb_to_hue(color)
Get the hue of pure red (RGB: 255, 0, 0)
rgb_to_hue(0xFF0000); // returns 0
Get the hue of pure green (RGB: 0, 255, 0)
rgb_to_hue(0x00FF00); // returns 120
Get the hue of pure blue (RGB: 0, 0, 255)
rgb_to_hue(0x0000FF); // returns 240
Get the hue of a light blue color (RGB: 173, 216, 230)
rgb_to_hue(0xADD8E6); // returns 194.73685026