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Reset foreground color (OSC 110)
ESC ] 110 BELOSC 110 resets the default foreground color to the terminal's configured default. The sequence is simply
ESC ] 110 BEL. This is the companion to OSC 10 — after changing the foreground color with OSC 10 ; color BEL, send OSC 110 to restore it. Applications that modify the default foreground (e.g. for theme switching) should reset on exit to avoid leaving the terminal in a modified state.How this is tested: Send
OSC 110 BEL and verify the terminal remains responsive (sequence consumed without error).Supported by 1 of 14 backends (7%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ? unknown | |
| Ghostty | 1.3.1 | ? unknown | |
| Kitty | 0.46.2 | ? unknown | OSC 110 foreground reset requires a real display — headless backends have no color palette to reset |
| VS Code | 1.113.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown | |
| Terminal.app | 2.15 | ? unknown |
Headless Backends
Parser correctness only — a ✓ means the parser accepts the sequence.
| Backend | Version | Support | Notes |
|---|---|---|---|
| vterm | 0.2.0 | ✓ yes | |
| Alacritty | 0.26.0 | ✗ no | OSC 110 foreground reset requires a real display — headless backends have no color palette to reset |
| vt100.js | 0.2.1 | ✗ no | Not implemented — pure TypeScript emulator |
| WezTerm | 0.1.0-fork.5 | ✗ no | OSC 110 foreground reset requires a real display — headless backends have no color palette to reset |
| xterm.js | 5.5.0 | ✗ no | OSC 110 foreground reset requires a real display — headless backends have no color palette to reset |