Colors:
Colors go from 0 to 15. rather than confusing the numbers around we start adding letters, so it becomes 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, A, B, C, D, E, F. 0 is the darkest of one particular color and 15 is the lightest. RGB are calculated meaning that they are in channels of 2, for example: #1211AC. meaning, 1 and 2 means a low red. 1, 1 means a low green. and AC means a higher blue. #000 is black and #fff is white.