Struct Palette 

pub struct Palette;

Basic 16-color palette — SGR 30-37/90-97 only, no truecolor RGB.

Why 16 colors: truecolor RGB renders the same pixel regardless of terminal theme. On Mac Terminal.app’s default “Basic” (light) profile, our old lavender/mint/grays landed on a light background and all but disappeared. The 16-color SGR palette (30-37, 90-97) is interpreted by the terminal’s own theme engine — each user’s colorscheme remaps the same escape into theme-appropriate RGB, so atomcode adapts to whatever terminal theme the user runs.

Compatibility floor: SGR 30-37/90-97 are part of the 1996 ECMA-48 baseline. Every modern terminal (macOS Terminal, iTerm2, Alacritty, Kitty, Wezterm, Windows Terminal, Win10 1511+ cmd.exe with VT mode, tmux, SSH-in-SSH) handles them identically. We specifically avoid \x1b[2m (dim) which isn’t reliable on Windows conhost < 1809.

Implementations

impl Palette

pub const BRAND: Color = Color::Magenta

pub const MUTED_LIGHT: Color = Color::DarkGrey

Muted text on light backgrounds. SGR 90 (“bright black”) maps to a mid-gray on most light themes — contrast against #FFFFFF lands around 4.5–5:1, comfortably above AA.

pub const MUTED_DARK: Color = Color::White

Muted text on dark backgrounds. SGR 37 (“regular white”) maps to a soft light-gray on dark themes — contrast against #1B1B1B to #303030 lands around 8–10:1.

Earlier this was Color::DarkGrey (SGR 90) for both modes on the theory that the terminal’s palette would adapt. Reality from Warp / iTerm2 / Mac Terminal screenshots: most dark themes map SGR 90 to ~#3F3F3F (≈ 3:1 against the dark bg) — child rows under a tool-batch header rendered almost invisible. Splitting MUTED into light/dark variants and switching via is_light_for_render recovers readable contrast on both.

pub const MUTED: Color = Self::MUTED_LIGHT

Back-compat alias — same value as MUTED_LIGHT so old call sites that pre-date the dark-mode split keep compiling. New code should call muted_for_current_theme instead so the shade tracks the active palette.

pub const ACCENT: Color = Color::Cyan

pub const BORDER: Color = Color::Cyan

pub const WARNING: Color = Color::Yellow

pub const ERROR: Color = Color::Red

pub const DIFF_ADD: Color = Color::Green

pub const DIFF_REMOVE: Color = Color::Red

pub const CODE: Color = Color::Cyan