owo-colors Adapter

The owo-colors feature enables zero-allocation terminal coloring via owo-colors, a modern, lightweight alternative to the colored crate.

[dependencies]
opaline = { version = "0.4", features = ["owo-colors"] }

Style Conversion

OpalineStyle converts to owo_colors::Style:

use opaline::{OpalineStyle, OpalineColor};
use owo_colors::{OwoColorize, Style};

let style: Style = OpalineStyle::fg(OpalineColor::new(225, 53, 255))
    .bold()
    .into();

println!("{}", "keyword".style(style));

OwoThemeExt

The extension trait provides convenient themed styling:

use opaline::{Theme, OwoThemeExt};
use owo_colors::OwoColorize;

let theme = Theme::default();

// Full style from a named style
let kw_style = theme.owo_style("keyword");
println!("{}", "fn".style(kw_style));

// Token color as foreground
let fg_style = theme.owo_fg("accent.primary");
println!("{}", "accent text".style(fg_style));

// Token color as background
let bg_style = theme.owo_bg("bg.highlight");
println!("{}", "highlighted".style(bg_style));

Gradient Strings

With owo-colors + gradients:

use opaline::adapters::owo_colors::gradient_string;

let theme = opaline::Theme::default();
if let Some(gradient) = theme.get_gradient("aurora") {
    let output = gradient_string("Rainbow gradient text!", gradient);
    println!("{output}");
}

owo-colors vs colored

Feature	owo-colors	colored
Allocation	Zero-alloc	Allocates ColoredString
API style	Extension trait	Extension trait
no_std	Supported	No
Runtime styles	Style builder	Per-call methods
Ecosystem	Modern, growing	Established, widely used

Both adapters can coexist. Enable cli and owo-colors simultaneously if needed.