Documentation references to "digits" should be "characters"

[GaryJ]

Some documentation references to digits should really be called characters, since they refer to parts of a hexadecimal number, and therefore not strictly 0-9 only.

[SergeyBiryukov]

Actually, Wikipedia refers to them as "hexadecimal digits":
​http://en.wikipedia.org/wiki/Web_colors#Hex_triplet
​http://en.wikipedia.org/wiki/Hexadecimal

[c3mdigital]

According to the open content dictionary a digit is defined as: A numeral that can be combined with others to write larger numbers, and that cannot itself be split into other numerals.
The digits of the decimal number system are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, and those in the hexadecimal number system are those in the decimal system along with A, B, C, D, E and F.

​http://en.wiktionary.org/wiki/digit