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Comparing rxvt-unicode/doc/rxvt.1.pod (file contents):
Revision 1.177 by root, Sun May 23 00:48:53 2010 UTC vs.
Revision 1.179 by root, Sun May 23 01:06:47 2010 UTC

… …
1459on some systems or setgid to root or to some other group on others. 1459on some systems or setgid to root or to some other group on others.
1460 1460
1461=head1 COLOURS AND GRAPHICS 1461=head1 COLOURS AND GRAPHICS
1462 1462
1463In addition to the default foreground and background colours, 1463In addition to the default foreground and background colours,
1464B<@@RXVT_NAME@@> can display up to 16 colours (8 ANSI colours plus 1464B<@@RXVT_NAME@@> can display up to 88/256 colours: 8 ANSI colours plus
1465high-intensity bold/blink versions of the same). Here is a list of the 1465high-intensity (potentially bold/blink) versions of the same, and 72 (or
1466colours with their names. 1466240 in 256 colour mode) colours arranged in an 4x4x4 (or 6x6x6) colour RGB
1467cube plus a 8 (24) colour greyscale ramp.
1468
1469Here is a list of the ANSI colours with their names.
1467 1470
1468=begin table 1471=begin table
1469 1472
1470 B<color0> (black) = Black 1473 B<color0> (black) = Black
1471 B<color1> (red) = Red3 1474 B<color1> (red) = Red3
… …
1491It is also possible to specify the colour values of B<foreground>, 1494It is also possible to specify the colour values of B<foreground>,
1492B<background>, B<cursorColor>, B<cursorColor2>, B<colorBD>, B<colorUL> as 1495B<background>, B<cursorColor>, B<cursorColor2>, B<colorBD>, B<colorUL> as
1493a number 0-15, as a convenient shorthand to reference the colour name of 1496a number 0-15, as a convenient shorthand to reference the colour name of
1494color0-color15. 1497color0-color15.
1495 1498
1496In addition to the colours defined above, @@RXVT_NAME@@ offers an 1499The following text gives values for the standard 88 colour mode (and
1497additional 72 colours. The first 64 of those (with indices 16 to 79) 1500values for the 256 colour mode in parentheses).
1498consist of a 4*4*4 RGB colour cube (i.e. I<index = r * 16 + g * 4 + b +
149916>), followed by 8 additional shades of gray (with indices 80 to 87).
1500 1501
1502The RGB cube uses indices 16..79 (16..231) using the following formulas:
1503
1504 index_88 = (r * 4 + g) * 4 + b + 16 # r, g, b = 0..3
1505 index_256 = (r * 16 + g) * 16 + b + 16 # r, g, b = 0..15
1506
1507The grayscale ramp uses indices 80..87 (232..239), from 10% to 90% in 10%
1508steps (1/26 to 25/26 in 1/26 steps) - black and white are already part of
1509the RGB cube.
1510
1501Together, all those colours implement the 88 colour xterm colours. Only 1511Together, all those colours implement the 88 (256) colour xterm
1502the first 16 can be changed using resources currently, the rest can only 1512colours. Only the first 16 can be changed using resources currently, the
1503be changed via command sequences ("escape codes"). 1513rest can only be changed via command sequences ("escape codes").
1514
1515Applications are advised to use terminfo or command sequences to discover
1516number and RGB values of all colours (yes, you can query this...).
1504 1517
1505Note that B<-rv> (B<"reverseVideo: True">) simulates reverse video by 1518Note that B<-rv> (B<"reverseVideo: True">) simulates reverse video by
1506always swapping the foreground/background colours. This is in contrast to 1519always swapping the foreground/background colours. This is in contrast to
1507I<xterm>(1) where the colours are only swapped if they have not otherwise 1520I<xterm>(1) where the colours are only swapped if they have not otherwise
1508been specified. For example, 1521been specified. For example,

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