# COLOUR_DEFAULT

- **Language:** C
- **Kind:** constant
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tmux.h#L647
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-define-tmux-h-colour_default/

```c
#define COLOUR_DEFAULT(c) ((c) == 8 || (c) == 9)
```

## Referenced by

- [`grid_clear`](/en/tmux/3.2a/reference/c-function-grid_clear/) (function)
- [`grid_empty_line`](/en/tmux/3.2a/reference/c-function-grid_empty_line/) (function)
- [`screen_write_clearendofline`](/en/tmux/3.2a/reference/c-function-screen_write_clearendofline/) (function)
- [`screen_write_clearline`](/en/tmux/3.2a/reference/c-function-screen_write_clearline/) (function)
- [`tty_attributes`](/en/tmux/3.2a/reference/c-function-tty_attributes/) (function)
- [`tty_clear_area`](/en/tmux/3.2a/reference/c-function-tty-c-tty_clear_area/) (function)
- [`tty_colours`](/en/tmux/3.2a/reference/c-function-tty-c-tty_colours/) (function)
- [`tty_fake_bce`](/en/tmux/3.2a/reference/c-function-tty-c-tty_fake_bce/) (function)