And to correct myself. :)
To turn bold off, the code is actually 22, and not 21. Weird, but that's 
the way it is.

	Johnny

Johnny Billquist wrote:
> To expand a little. This has nothing to do with bash or NetBSD and so 
> on... What we're talking about here is the ANSI escape codes to select 
> graphic rendition (SGR). They are documented by ANSI, and you can 
> probably find them in any number of places on the net.
> 
> Good things to know:
> 
> The general format is:
> 
> CSI <n> ; <n> ; <n> . . . m
> 
> Where CSI is the code to start an escape sequence. It can be the 8-bit 
> CSI character, or the 7-bit equivalent, which is ESC [
> 
> You can then have zero or more numeric parameters, finished by a small 
> 'm'. Each parameter is separated from the next one with a semicolon.
> 
> If no number is given, it's the same as giving a '0'.
> 
> Parameters are:
> 0 - All attributes off
> 1 - Bold
> 4 - Underline
> 5 - Blinking
> 7 - Negative image
> 8 - Invisible image
> 21 - Bold off
> 24 - Underline off
> 25 - Blinking off
> 27 - Negative image off
> 28 - Invisible image off
> 30 - Foreground color 0 (Black)
> 31 - Foreground color 1 (Red)
> 32 - Foreground color 2 (Green)
> 33 - Foreground color 3 (Yellow)
> 34 - Foreground color 4 (Blue)
> 35 - Foreground color 5 (Magenta)
> 36 - Foreground color 6 (Cyan)
> 37 - Foreground color 7 (White)
> 39 - Default foreground color
> 40 - Background color 0 (Black)
> 41 - Background color 1 (Red)
> 42 - Background color 2 (Green)
> 43 - Background color 3 (Yellow)
> 44 - Background color 4 (Blue)
> 45 - Background color 5 (Magenta)
> 46 - Background color 6 (Cyan)
> 47 - Background color 7 (White)
> 49 - Default background color
> 
> Now, this is as a VT525 will interpret it. On an Xterm, I've found that 
> 37 and 47 are a grayish color, and not white. Also, 90-97 are lighter 
> versions of the foreground colors, and 100-107 are lighter versions of 
> the background colors (probably the same as if you select a color and 
> select bold).
> 
> I'm not sure ANSI specifies exactly which colors to expect.
> 
> Now, given this information, your answer about light red being 1;30 is 
> somwhat misleading. What you're actually doing is selecting bold, red 
> text. :-) However, I'm pretty sure the end result on most terminals will 
> look the same, so it's maybe not that important.
> 
> Some people might know parts of this since old times, since the VT100 
> and all follow ons also implement the applicable parts of this. Color is 
> not something a VT100 can do, and the 2x attributes, to actually turn 
> off attributes didn't come until the VT200 series, and the same is true 
> for the concealed attribute.
> 
>     Johnny
> 
> 
> George Georgalis wrote:
> 
>> On Sun, Sep 24, 2006 at 03:02:10PM -0400, George Georgalis wrote:
>>
>>> I'm looking for a way to reverse text color. (eg transpose
>>> foreground/background) I'm expecting to find some esc or ctrl
>>> sequence of characters to turn on reverse video and similarly to
>>> turn off.  Normally I would ssh in, from an xterm, but I'd like a
>>> technique to work as expected from console, as well--if that's an
>>> issue I can check TERM setting.
>>>
>>> The only doc I've seen on doing this is for PS1 on some shells
>>> but I'm looking for something generic enough that I can invoke
>>> with printf commands.
>>
>>
>>
>> with a little luck and finding some bash PS1 notes... I'm answering
>> my own question.
>>
>> # The color terminal (cterm) palette  (and bash escape codes)
>> # The forground Colors (background colors begin with 4 verses 3)
>> # Black       0;30     Dark Gray     1;30
>> # Red         0;31     Light Red     1;31
>> # Green       0;32     Light Green   1;32
>> # Brown       0;33     Yellow        1;33
>> # Blue        0;34     Light Blue    1;34
>> # Purple      0;35     Light Purple  1;35
>> # Cyan        0;36     Light Cyan    1;36
>> # Light Gray  0;37     White         1;37
>> # Attribute codes:
>> # 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
>>
>> and looking at 'script' output of some color sequences...
>>
>> echo "hello"
>>
>> (if this email comes in 8 bit) that's ^[[7m to start reverse and
>> ^[[m to reset the change (note esc char, ^[).
>>
>> but a more universal way might be using "tput" unfortunately
>> you may need the termcap(5) man page too for that.
>>
>> tput mr ; printf hello ; tput me ; echo world
>>
>> and this works both on console and xterm.  I never did find netbsd
>> doc on the color codes but this generates a palette of available
>> colors.
>>
>> for n in `seq 0 9` ; do for u in `seq 0 57` ; do
>>  printf "^[[${n};${u}m${n};${u}^[[m"
>> done; done
>> echo
>>
>> (note two esc characters as "^[")
>>
>> // George
>>
>>