COLORS man page on Plan9

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COLORS(1)							     COLORS(1)

       getmap, colors - display color map

       colors [ -rx ]

       getmap [ colormap ]

       Colors presents a grid showing the colors in the current color map.  If
       the display is true color, colors shows a grid of the  RGBV  color  map
       (see color(6)).

       Clicking	 mouse	button 1 over a color in the grid will display the map
       index for that color, its red, green,  and  blue	 components,  and  the
       32-bit  hexadecimal color value as defined in allocimage(2).  If the -x
       option is specified, the components will also be listed in hexadecimal.

       The -r option instead shows, in the same form, a grey-scale ramp.

       A menu on mouse button 3 contains a single entry, to exit the program.

       On 8-bit color-mapped displays, getmap loads the	 display's  color  map
       (default rgbv).	The named colormap can be a file in the current direcā€
       tory or in the standard repository /lib/cmap.  It can also be a	string
       of  the form gamma or gammaN, where N is a floating point value for the
       gamma, defining the contrast for a monochrome map.   Similarly,	rgamma
       and  rgammaN define a reverse-video monochrome map.  Finally, the names
       screen or display or vga are taken as synonyms for  the	current	 color
       map stored in the display hardware.

       /lib/cmap directory of color map files



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