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ANSI CODES

The standard ANSI CGI/SGR codes for setting character attributes are listed below.

They might not behave the same way on all types of terminals, (this goes especially for the styles) so do not use them where they can create trouble for others.

Foreground Colours        High Colours
Black... <esc>[30m        Black... <esc>[90m
Red..... <esc>[31m        Red..... <esc>[91m
Green... <esc>[32m        Green... <esc>[92m
Yellow.. <esc>[33m        Yellow.. <esc>[93m
Blue.... <esc>[34m        Blue.... <esc>[94m
Magenta. <esc>[35m        Magenta. <esc>[95m
Cyan.... <esc>[36m        Cyan.... <esc>[96m
White... <esc>[37m        White... <esc>[97m

Background Colours        Background High Colours
Black... <esc>[40m        Black... <esc>[100m
Red..... <esc>[41m        Red..... <esc>[101m
Green... <esc>[42m        Green... <esc>[102m
Yellow.. <esc>[43m        Yellow.. <esc>[103m
Blue.... <esc>[44m        Blue.... <esc>[104m
Magenta. <esc>[45m        Magenta. <esc>[105m
Cyan.... <esc>[46m        Cyan.... <esc>[106m
White... <esc>[47m        White... <esc>[107m

Text Style Attributes
Bold......... <esc>[1m
Faint........ <esc>[2m
Italic....... <esc>[3m
Underline.... <esc>[4m
Blink........ <esc>[5m
Inverse...... <esc>[7m
Ansi off..... <esc>[0m

See https://en.wikipedia.org/wiki/ANSI_escape_code#SGR for further documentation.

8-bit colours

For terminals that support 256 colours, <esc>[38;5;Nm and <esc>[48;5;Nm set the foreground and background, respectively, to N, one of:

0-7	standard colours black through white as above
8-15	high intensity colours black through white as above
16-231	6×6×6 values of varying red/green/blue intensity
232-255	24 shades of grey, dark to bright

24-bit colours

For terminals that support 24-bit RGB colours, <esc>[38;2;r;g;bm sets the foreground (use 48 for background), where r, g, and b are the red/green/blue components, each 0-255.

The ITU standard says to use <esc>[38:2::r:g:bm instead, but MUME doesn't use this today.

Underline styles

A few terminals (like kitty) supports underline styles. The following are supported by MUME:

Single line	<esc>[4m
Double lines	<esc>[4:2m
Curly	<esc>[4:3m
Dotted	<esc>[4:4m
Dashed	<esc>[4:5m

If underline is enabled, the following can be used to specify their colour:

8-bit colour	<esc>[58:5:<8-bit colour>m
24-bit colour	<esc>[58:2:<r>:<g>:<b>m

More documentation on underline styles is available at https://sw.kovidgoyal.net/kitty/underlines/.

What is MUME?

MUME, Multi-Users in Middle-earth, is a multiplayer text-based online game based upon J. R. R. Tolkien’s Middle-earth during the epic wars of the late Third Age between the forces of the Dark Lord and the armies of the Free peoples. MUME is completely at no cost and has been continuously running, expanded, and remastered by a community of volunteers since 1991.

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