A color value can be represented in various ways with p5.js. It can be given as:
* Gray value as one numeric value between 0 and 255.
* RGB (Red, Green, Blue) value as three numeric values between 0 and 255.
* RGBA (Red, Green, Blue, Alpha) value as four numeric values between 0 and 255.
* Hexadecimal value as a string.
* HSB (Hue, Saturation, Brightness) value as three numeric values between 0 and 360 for hue and between 0 and 100 for saturation and brightness.
