Based on mIRC Forums Discussion
Implemented in WeeChat (v1.1), Irssi (0.8.17), mIRC (since v7.51.212), IRCCloud (since 2017/11/20), The Lounge (since 2017/12/08), Textual (v7.1.0), Igloo IRC, WinShoe (2.00), senpai. (know more clients? contact Nei to update this document.)
Keeps compatible with existing mIRC Colour codes.
Old clients will ignore "new" colours or just substitute other colours instead.
No real true colour.
Wire protocol is: Control+C [0-9]{1,2} (,[0-9]{1,2})? to set foreground and optionally background, compatible with the existing mIRC colour codes and making use of the non-standardised colour numbers 16-98.
Visual IRC Specification, with alternate RGB Colour Proposal
Alternate Proposal: Control+C # RRGGBB to specify full RGB colours, claim to have been implemented in now defunct Atheme Conspire fork of X-Chat.
Disadvantage: Non-supporting clients will litter the screen with "raw" #rrggbb codes.
Potential Advantage: Clean cut, full RGB support; easy to implement without table; those visible raw codes might be an incentive for clients to add support.
| RGB Colour Specification | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16-27 | 470000 | 472100 | 474700 | 324700 | 004700 | 00472c | 004747 | 002747 | 000047 | 2e0047 | 470047 | 47002a |
| 28-39 | 740000 | 743a00 | 747400 | 517400 | 007400 | 007449 | 007474 | 004074 | 000074 | 4b0074 | 740074 | 740045 |
| 40-51 | b50000 | b56300 | b5b500 | 7db500 | 00b500 | 00b571 | 00b5b5 | 0063b5 | 0000b5 | 7500b5 | b500b5 | b5006b |
| 52-63 | ff0000 | ff8c00 | ffff00 | b2ff00 | 00ff00 | 00ffa0 | 00ffff | 008cff | 0000ff | a500ff | ff00ff | ff0098 |
| 64-75 | ff5959 | ffb459 | ffff71 | cfff60 | 6fff6f | 65ffc9 | 6dffff | 59b4ff | 5959ff | c459ff | ff66ff | ff59bc |
| 76-87 | ff9c9c | ffd39c | ffff9c | e2ff9c | 9cff9c | 9cffdb | 9cffff | 9cd3ff | 9c9cff | dc9cff | ff9cff | ff94d3 |
| 88-98 | 000000 | 131313 | 282828 | 363636 | 4d4d4d | 656565 | 818181 | 9f9f9f | bcbcbc | e2e2e2 | ffffff | |
| Terminal Indexed Colour Specification | ||||||||||||
| 16-27 | 52 | 94 | 100 | 58 | 22 | 29 | 23 | 24 | 17 | 54 | 53 | 89 |
| 28-39 | 88 | 130 | 142 | 64 | 28 | 35 | 30 | 25 | 18 | 91 | 90 | 125 |
| 40-51 | 124 | 166 | 184 | 106 | 34 | 49 | 37 | 33 | 19 | 129 | 127 | 161 |
| 52-63 | 196 | 208 | 226 | 154 | 46 | 86 | 51 | 75 | 21 | 171 | 201 | 198 |
| 64-75 | 203 | 215 | 227 | 191 | 83 | 122 | 87 | 111 | 63 | 177 | 207 | 205 |
| 76-87 | 217 | 223 | 229 | 193 | 157 | 158 | 159 | 153 | 147 | 183 | 219 | 212 |
| 88-98 | 16 | 233 | 235 | 237 | 239 | 241 | 244 | 247 | 250 | 254 | 231 | |