I tried to customize my emacs color by changing font-lock faces' color (M-x customize-face). But I found that the amount of color is not as many as all the values #xxxxxx. For example, when changing a color value from #000000 to #FF0000, I just got only two color, 'red' and a 'lighter red'.
Is this the limit of emacs or I need to use another way to express color value?
Apparently a Windows shell doesn't support colors. Either get a modern shell or run in Window mode.