Re: min-colors 88

[Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

fatiparty--- via Users list for the GNU Emacs text editor wrote:

> I could be mistaking the interpretation of the hex-codes to
> the number of colours available.

Notation: #RRGGBB

Each channel: 1 byte = 8 bits

e.g., say "winter blue" is #385d7d, that is binary

  111000 1011101 1111101

As you see, there are

  (16^2)^3 = 16 777 216

colors available!

(or computed from the 24-bit binary,

  2^24 = the same)

However, in _another_ sense there are (or can be) just 8
colors available, and 8 bright versions of them! Here are, for
example, mine! I have them in a tailored file so they are easy
to see and edit, they are then processed to the less-palatable
original Linux format, and the colors appear in the
ttys/Linux VTs/the console.

So the file:

   normal                         bright
   bk  r   g   y  bl   m   c   w  bk    r   g   y  bl   m   c   w
r  0 255   0 190 100 180   0 150  115 255   0 255 125 250  90 210
g  0  50 155 190 100 105 180 150  115  80 185 127 125  90 255 180
b  0  50   0   0 255   0 180 150  115  80   0   0 255 250 255 140

See, there are 8 colors! ........ OK, 16 then!

But you also see that each channel is 0-255. So then we are
back at

  256^3 = 16 777 216

colors available!

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