Simply put a number between 0 and 255. Please put only numbers that are not fractions and between 0 and 255.
You can check the conversion table here: http://ascii.cl/conversion.htm Hex numbers have a base of 16, and decimal (regular) numbers have a base of 10. The 10 decimal digits are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. The 16 hex digits are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F.
