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ANSI escape sequence question

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Posted by Arcusix   (1 post)  [Biography] bio
Date Sat 09 Jul 2016 10:50 AM (UTC)
Message
Obviously this isn't the right sub-forum for this question. Feel free to perform voodoo curses on me, as appropriate.

I noticed the following ANSI escape sequence recently:

ESC+[1;32;40m

This equates to BOLD + GREEN + BLACK BACKGROUND. My question is, why doesn't BOLD apply to both the foreground and background colours? I don't understand the rule. Does BOLD only apply to the foreground, in all circumstances?

I noticed that MUSHclient, in common with Mudlet and even raw telnet on a Linux Box, only apply the bold to the foreground colour.
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Posted by Nick Gammon   Australia  (21,322 posts)  [Biography] bio   Forum Administrator
Date Reply #1 on Sun 10 Jul 2016 06:24 AM (UTC)
Message
Well, strictly speaking, bold shouldn't change the colour at all. For example in your word processor, if you make a word bold neither its colour, nor the background colour, changes.

I think it is a convention in MUD games at least, that the use of bold switches the foreground colour to a brighter version of the colour. To change the background as well would be very off-putting. For example, assuming a black background, "bold black" would make every bolded word appear on a grey (not black) background.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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