bigcolor

A comprehensive Rust color manipulation library, inspired by TinyColor and Color.js. Designed to be intuitive, powerful, and fast for working with colors in various formats.

Features

Extensive Format Support
- Parse colors from RGB, RGBA, HSL, HSLA, HSV, HSVA, HSB, HSBA, HEX, CMYK, LAB, LCH, OKLAB, OKLCH
- Convert between any of these formats easily
- Support for named colors (CSS/SVG color keywords)
- Space-separated HSL format (e.g. 0 0% 12%) used in CSS variables
Color Manipulation
- Lighten, darken, saturate, desaturate, spin (adjust hue)
- Convert to greyscale, complement, invert
- Easily get brightness, luminance, and alpha values
Color Schemes
- Generate color schemes: analogous, monochromatic, triad, tetrad, split complement
- Create harmonious color palettes for design projects
Utilities
- Color mixing and blending
- WCAG contrast checking
- Color readability tools
- Bulk text color format conversion

Installation

Add this to your Cargo.toml:

[dependencies]
bigcolor = "0.1.0"

Usage Examples

Basic Color Creation and Conversion

use bigcolor::BigColor;

fn main() {
    // Create colors from different formats
    let red_hex = BigColor::new("#ff0000");
    let blue_name = BigColor::new("blue");
    let green_rgb = BigColor::new("rgb(0, 255, 0)");
    let purple_hsl = BigColor::new("hsl(270, 100%, 50%)");
    let cyan_hsb = BigColor::new("hsb(180, 100%, 100%)");
    let yellow_cmyk = BigColor::new("cmyk(0%, 0%, 100%, 0%)");
    
    // Convert between formats
    println!("Red as RGB: {}", red_hex.to_rgb_string());          // rgb(255, 0, 0)
    println!("Blue as HSL: {}", blue_name.to_hsl_string());       // hsl(240, 100%, 50%)
    println!("Green as HEX: {}", green_rgb.to_hex_string(false)); // #00ff00
    println!("Purple as HSB: {}", purple_hsl.to_hsb_string());    // hsb(270, 100%, 100%)
    println!("Cyan as CMYK: {}", cyan_hsb.to_cmyk_string());      // cmyk(100%, 0%, 0%, 0%)
    println!("Yellow as OKLCH: {}", yellow_cmyk.to_oklch_string()); // oklch(97% 0.2 85)
}

Color Modification

use bigcolor::BigColor;

fn main() {
    let color = BigColor::new("#1a6ef5"); // A blue color
    
    // Create variations
    let mut lighter = color.clone_color();
    lighter.lighten(Some(20.0));
    
    let mut darker = color.clone_color();
    darker.darken(Some(20.0));
    
    let mut more_saturated = color.clone_color();
    more_saturated.saturate(Some(30.0));
    
    let mut complementary = color.clone_color();
    complementary.complement();
    
    println!("Original: {}", color.to_hex_string(false));
    println!("Lighter: {}", lighter.to_hex_string(false));
    println!("Darker: {}", darker.to_hex_string(false));
    println!("More Saturated: {}", more_saturated.to_hex_string(false));
    println!("Complementary: {}", complementary.to_hex_string(false));
}

Color Schemes

use bigcolor::BigColor;

fn main() {
    let base_color = BigColor::new("#1a6ef5");
    
    // Generate color schemes
    let analogous = base_color.analogous(Some(5), Some(30));
    let monochromatic = base_color.monochromatic(Some(5));
    let triad = base_color.triad();
    let tetrad = base_color.tetrad();
    let split_complement = base_color.split_complement();
    
    // Print the hex values for the triad scheme
    println!("Triad color scheme:");
    for color in triad {
        println!("  {}", color.to_hex_string(false));
    }
}

Bulk Color Conversion

use bigcolor::{BigColor, ColorFormat};
use regex::Regex;

fn convert_colors_in_text(text: &str, target_format: ColorFormat) -> String {
    // Get a BigColor instance from the library
    // This is a simplified example - see demo for full implementation
    let color = BigColor::new("#ff0000");
    let converted = color.to(target_format);
    text.replace("#ff0000", &converted)
}

fn main() {
    let css_code = r#"
    .header {
        background-color: #ff0000;
        color: rgb(255, 255, 255);
        border: 1px solid hsl(0, 0%, 80%);
    }
    "#;
    
    // Convert all colors to HSL format
    let result = convert_colors_in_text(css_code, ColorFormat::HSL);
    println!("Converted CSS:\n{}", result);
}

Demo Application

A demo web application is available to explore the capabilities of the BigColor library:

Color parsing and conversion
Color manipulation and scheme generation
Bulk color conversion tool
Interactive color previews

To run the demo:

cd demo
trunk serve

Then open your browser to http://localhost:8080

Color Format Support

Input Formats

The library accepts the following color formats:

Named Colors: red, blue, rebeccapurple, etc.
Hex: #f00, #ff0000, #ff0000ff
RGB: rgb(255, 0, 0), rgba(255, 0, 0, 0.5), rgb(100%, 0%, 0%)
HSL: hsl(0, 100%, 50%), hsla(0, 100%, 50%, 0.5)
HSV/HSB: hsv(0, 100%, 100%), hsb(0, 100%, 100%)
CMYK: cmyk(0%, 100%, 100%, 0%)
LAB: lab(50, 80, 67)
LCH: lch(50, 80, 20)
OKLAB: oklab(60%, 0.1, 0.2)
OKLCH: oklch(60%, 0.1, 30)
Space-separated HSL: 0 0% 12% (common in CSS variables)

Output Formats

Convert to any of these formats using the corresponding method:

let color = BigColor::new("#ff0000");

color.to_hex_string(false);    // "#ff0000"
color.to_rgb_string();         // "rgb(255, 0, 0)"
color.to_hsl_string();         // "hsl(0, 100%, 50%)"
color.to_hsv_string();         // "hsv(0, 100%, 100%)"
color.to_hsb_string();         // "hsb(0, 100%, 100%)"
color.to_cmyk_string();        // "cmyk(0%, 100%, 100%, 0%)"
color.to_oklch_string();       // "oklch(63% 0.26 29)"

License

MIT License - see the LICENSE file for details.

Credits

This library is partially a port of TinyColor by Brian Grinstead and inspired by Color.js.

bigcolor 1.0.1