| Linux console | ✔ | ✔ | N/A |`TERM=linux` `COLORTERM=24bit` | 8 (512 glyph fonts) or 16 (256 glyph fonts) colors max, but RGB values are downsampled to a 256-index palette. See below. |
| kmscon | | ? | ? |`TERM=xterm-256color` | No RGB color AFAICT, nor any distinct terminfo entry. |
| XTerm | | ✔ |🗴 |`TERM=xterm+256color2` `COLORTERM=24bit` | See note about DirectColor. Must configure with `--enable-direct-color`. `TERM=xterm-direct` seems to have the undesirable effect of mapping low RGB values to a palette; I don't yet understand this well. The problem is not seen with the specified configuration. Sixel support when built with `--enable-sixel-graphics` and run in vt340 mode. |
| GNU Screen | 🗴 | ✔ | |`TERM=screen.OLDTERM` | Must be compiled with `--enable-256color`. `TERM` should typically be `screen.` suffixed by the appropriate `TERM` value for the true connected terminal, e.g. `screen.vte-256color`. See below. |
| tmux | | | | | |
implementation of block-drawing characters, or relies on the font. Patches
| Gnome Terminal | 🗴 | ✔ |? |`TERM=gnome` `COLORTERM=24bit` | `ccc` support *is* available when run with `vte-256color`. |
| Guake | | | | | |
| ITerm2 | ? | ? |? | | |
| Kitty | ✔ | 🗴 |✔ |`TERM=xterm-kitty` | |
| kmscon | ? | ? |? |`TERM=xterm-256color` | No RGB color AFAICT, nor any distinct terminfo entry. |
| Konsole | 🗴 | ✔ |? |`TERM=konsole-direct` | |
| Linux console | ✔ | ✔ |N/A |`TERM=linux` `COLORTERM=24bit` | 8 (512 glyph fonts) or 16 (256 glyph fonts) colors max, but RGB values are downsampled to a 256-index palette. See below. |
| mlterm | 🗴 | ✔ |? |`TERM=mlterm-256color` | Do not set `COLORTERM`. `mlterm-direct` gives strange results. |
| GNU Screen | 🗴 | ✔ |? |`TERM=screen.OLDTERM` | Must be compiled with `--enable-256color`. `TERM` should typically be `screen.` suffixed by the appropriate `TERM` value for the true connected terminal, e.g. `screen.vte-256color`. See below. |
| XTerm | ? | ✔ |🗴 |`TERM=xterm+256color2` `COLORTERM=24bit` | See note about DirectColor. Must configure with `--enable-direct-color`. `TERM=xterm-direct` seems to have the undesirable effect of mapping low RGB values to a palette; I don't yet understand this well. The problem is not seen with the specified configuration. Sixel support when built with `--enable-sixel-graphics` and run in vt340 mode. |
| Yakuake | ? | ? |? | ? | |
Note that `xfce4-terminal`, `gnome-terminal`, etc. are essentially skinning