GitHub - yup/ruby-256-color-demo: Two-hundred and fifty six colors in your Unix terminal, you ask? Yes, it’s possible, but 256-color support isn’t very common among the terminal emulators out there (Konsole and Gnome-Terminal don’t support it yet). And elinks is the only program I know of that supports 256 colors natively. So, here’s a little Ruby program that generates 256-color color cubes in Ruby. I’ve translated it from a Perl script, so it’s not very ruby-like, but it makes pretty pictures.

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Two-hundred and fifty six colors in your Unix terminal, you ask? Yes, it’s possible, but 256-color support isn’t very common among the terminal emulators out there (Konsole and Gnome-Terminal don’t support it yet). And elinks is the only program I know of that supports 256 colors natively. So, here’s a little Ruby program that generates 256-colo…

www.yup.com/articles/2006/04/15/ruby-goes-256-color-in-xterm

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+----------------------------------------------------------------------------+
| This program shows 256-color support in xterm-compliant terminals. You may |
| notice some flickering while the color codes are mapped in your terminal.  |
| Please resize your terminal to at least the width of this box. Try this:   |
| xterm -fg beige -bg midnightblue -fa "antialias=true:rgba=0:pixelsize=18"  |
+-------------+--------------------------------------------------------------+
| Color Range | Description                                                  |
+-------------+--------------------------------------------------------------+
|  000 - 015  | Standard ANSI colors, but with more pleasing shades          |
|  016 - 231  | 6x6x6 color cube                                             |
|  232 - 255  | Greyscale ramp, with black and white intentionally omitted   |
+-------------+--------------------------------------------------------------|
| Translation: 256colors.rb by Daniel Butler <[email protected]>  2005-10-30 |
| Original: 256colors2.pl by Todd Larason <[email protected]> v1.1 1999-07-11 |
+----------------------------------------------------------------------------+