The code starts with #c, followed by 3x 2 numbers/letters. Every 2 numbers/letters are a hexicedimal number.
Every pair is minimum 00, and maximum FF (0-9, A-F x2). The first 2 are for red, the 2nd 2 are for green and the 3rd 2 are for blue.
Examples: #cFF0000: Red #c00FF00: Green #c0000FF: Blue