Crate terminal_colorsaurus

Determines the background and foreground color of the terminal using the OSC 10 and OSC 11 terminal sequence.

This crate helps answer the question “Is this terminal dark or light?”.

Features

• Background and foreground color detection.
• Uses a fast and reliable heuristic to detect if the terminal supports color querying.
• Correct perceived lightness calculation.
• Works on Windows (starting with Windows Terminal v1.22).
• Safely restores the terminal from raw mode even if the library errors or panicks.
• Does not send any escape sequences if TERM=dumb.
• Works even if all of stderr, stdout and stdin are redirected.
• Supports a timeout (for situations with high latency such as an SSH connection).

Terminal Support

terminal-colorsaurus works with most modern terminals and has been tested extensively. It’s also really good at detecting when querying for the terminal’s colors is not supported.

Example 1: Test If the Terminal Uses a Dark Background

use terminal_colorsaurus::{color_scheme, QueryOptions, ColorScheme};

let color_scheme = color_scheme(QueryOptions::default()).unwrap();
dbg!(color_scheme == ColorScheme::Dark);

Example 2: Get the Terminal’s Foreground Color

use terminal_colorsaurus::{foreground_color, QueryOptions};

let fg = foreground_color(QueryOptions::default()).unwrap();
println!("rgb({}, {}, {})", fg.r, fg.g, fg.b);

Optional Dependencies

• rgb — Enable this feature to convert between Color and rgb::RGB16 / rgb::RGB8.
• anstyle — Enable this feature to convert Color to anstyle::RgbColor.

Modules

• comparisondocsrs
  Comparison with other crates in the ecosystem.
• feature_detectiondocsrs
  How does colorsaurus detect if a terminal supports querying its colors?
• latencydocsrs
  What kind of latency do I have to expect?
• terminal_surveydocsrs
  The following terminals have known support or non-support for querying for the background/foreground colors and have been tested with terminal-colorsaurus:

Structs

• Color
  An RGB color with 16 bits per channel. You can use Color::scale_to_8bit to convert to an 8bit RGB color.
• ColorPalette
  The color palette i.e. foreground and background colors of the terminal. Retrieved by calling color_palette.
• QueryOptions
  Options to be used with foreground_color and background_color. You should almost always use the unchanged QueryOptions::default value.

Enums

• ColorScheme
  The color scheme of the terminal.
• Error
  An error returned by this library.

Functions

• background_color
  Queries the terminal for it’s background color.
  If you also need the foreground color it is more efficient to use color_palette instead.
• color_palette
  Queries the terminal for it’s color scheme (foreground and background color).
• color_scheme
  Detects if the terminal is dark or light.
• foreground_color
  Queries the terminal for it’s foreground color.
  If you also need the foreground color it is more efficient to use color_palette instead.

Type Aliases

• Result
  Result used by this library.