Flagship themes

GitHub Colorblind (Primer) — protanopia & deuteranopia

The most widely deployed CVD themes in existence: shipped to every github.com user (beta announcement, 2021-09-29, renamed “Protanopia & Deuteranopia”, 2022-04-19), generated from design tokens in primer/primitives (MIT) and consumed downstream by the GitHub VS Code theme, the Neovim port projekt0n/github-nvim-theme, iTerm2 ports, and base16/tinted-theming schemes. Separate Tritanopia variants exist (changelog).

The signature move: dark-mode fgColor-success #3fb950 (green) → #58a6ff (blue); fgColor-danger #f85149 (red) → #f0883e (orange).

	bg	fg	keyword	func	string	number	type	comment
Dark	`#0d1117`	`#e6edf3`	`#ec8e2c`	`#d2a8ff`	`#a5d6ff`	`#79c0ff`	`#ffa657`	`#8b949e`
Light	`#ffffff`	`#1f2328`	`#b35900`	`#6639ba`	`#0a3069`	`#0550ae`	`#953800`	`#57606a`

Note the tritanopia row: it is the only simulation where these hues visibly shift — this theme pair targets red-green CVD; GitHub ships separate tritanopia themes for that axis.

Modus themes (Emacs) — deuteranopia & tritanopia

By Protesilaos Stavrou. Canonical in Emacs (built-in since Emacs 28; protesilaos.com/emacs/modus-themes, repo, GPL-3.0). Four dedicated CVD variants: modus-operandi-deuteranopia / -tritanopia (light), modus-vivendi-deuteranopia / -tritanopia (dark). The whole family is WCAG AAA (≥7:1 contrast); CVD variants additionally re-route semantic colors off the confused axis. Ported to Neovim and Zed (all 8 variants), plus iTerm2.

	bg	fg	red	green	yellow	blue	magenta	cyan
Operandi (light)	`#ffffff`	`#000000`	`#a60000`	`#006800`	`#695500`	`#0031a9`	`#721045`	`#005e8b`
Vivendi (dark)	`#000000`	`#ffffff`	`#ff5f59`	`#44bc44`	`#cabf00`	`#2fafff`	`#feacd0`	`#00d3d0`

ef-themes (Emacs) — the second CVD Emacs family, errors remapped to yellow

Also by Protesilaos Stavrou (repo, GPL-3.0; GNU ELPA + MELPA as ef-themes). Alongside modus, this is the second CVD-specific Emacs family — the ef CVD quartet: ef-deuteranopia-dark, ef-deuteranopia-light, ef-tritanopia-dark, ef-tritanopia-light. The signature design move is different from modus: semantic mappings route err → yellow-warmer and warning → yellow-cooler, so errors are yellow, not red. Source comment: “Most of the colors here, like the red and green hues, are defined simply to preserve compatibility… We don’t actually rely on them for anything critical.”

	bg	fg	red	green	yellow	blue	magenta
ef-deuteranopia-dark	`#000a1f`	`#ddddee`	`#cf8560`	`#3faa26`	`#aa9f32`	`#3f90f0`	`#b379bf`
ef-deuteranopia-light	`#f5f5ff`	`#1a1a2f`	`#d3303a`	`#217a3c`	`#805d00`	`#375cd8`	`#ba35af`

The four Ef variants ship in WezTerm’s built-in scheme index (Ef-Deuteranopia-Dark/Light, Ef-Tritanopia-Dark/Light) alongside three Modus ports — making WezTerm one of the few terminals with first-party CVD schemes.

Pierre — four CVD themes with a build-time simulation gate

From Pierre Computer Company: pierre-{light,dark}-{protanopia-deuteranopia,tritanopia} (repo, npm @pierre/theme, Apache-2.0; also generates Zed and VS Code themes). The most rigorously engineered entry in this report: packages/theme/ACCESSIBILITY.md documents a hard build gate that simulates every chromatic role under Machado (2009) in both linear-RGB and gamma-sRGB and fails the build if CIEDE2000 ΔE < 11 (diffs, merges, terminal red/green) or < 8 (diagnostics, core syntax). Signals remap to the preserved axis: blue↔orange for red-green CVD, red↔teal/cyan for tritanopia.

datum — Okabe–Ito hues, rebuilt in OKLCH

By w0zro (repo, site, MIT, 2026) — the newest entry. Hue angles anchored on the Okabe–Ito set, placed in OKLCH, “verified against WCAG 2.2 and APCA” and simulated against all three dichromacies. Ships for Neovim/Vim, VS Code, Ghostty, Kitty, Alacritty, WezTerm, tmux, fzf, bat, delta, and in iTerm2-Color-Schemes. Dark + light.

	bg	fg	blue	green	cyan	yellow	orange	pink
Dark	`#0f1318`	`#ced3d9`	`#69b9f7`	`#54dcaa`	`#6ae5ec`	`#e8df69`	`#f8bd5f`	`#fa94cd`
Light	`#f1f6fd`	`#242a30`	`#0176b8`	`#007553`	`#0d7a7f`	`#976700`	`#a24500`	`#973070`