HexColor is an effective and practical, free graphic program, designed to know the hexadecimal value of any colour.
It is really simple to use: just select the wallpaper you want and it quickly and easily shows you the hexadecimal value. You can even drag the mouse cursor to a colour and it will automatically save the hexadecimal value.
HexColor is a very practical program, above all for websites. It has various configuration options, and functions like AutoCopy (automatically insert a colour in the program table) or AutoPaste (automatically read a colour from the program table).
HexColor also saves a log of all the colours and their hexadecimal values as you capture them, so you can use that information quickly and easily without having to create your own document.