Color that lets your eyes rest.

One calm palette for the 52 apps you work in all day. Four variants, from night to high contrast.

New: a free e-book on color for screens →

Kvile NattSkumringDagKontrast (nightduskdayhigh contrast). The default. Deep blue-black with a soft, cool light. Made for long evenings.A little lighter than Natt. For rooms that are not quite dark.The light variant. Pale blue-white paper and ink that stays readable in daylight.The same palette pushed to the highest contrast, for bright rooms and tired eyes. Use the switch above: the whole page changes with it.

schedule.ts

import { createServer } from "node:http";

type Session = { name: string; hours: number };

// Calm by default, bright only where it matters.
const MAX_HOURS = 8;
const pattern = /^kvile-(\w+)$/i;

export function schedule(s: Session): string {
  if (s.hours > MAX_HOURS) {    throw new Error("Take a break: " + s.hours);
  }
  return s.name.replace(pattern, "$1");
}

mainTypeScriptJetBrains Mono 14

52 apps, one palette.

Editors, terminals, shells, command-line tools, browsers and more. Each preview below uses the real Kvile colors.

In the real apps

bat

cli

kitty

terminal

Xcode

editor

49 more, as previews

Visual Studio Code

editor

schedule.tstheme.json

export function schedule(s: Session) {
  return s.hours < MAX_HOURS;
}
// calm by default

mainLn 2, Col 10TypeScript

Neovim

editor

local M = {}
function M.setup(opts)
  vim.cmd("colorscheme kvile")
end

NORMALkvile.luautf-8 4:12

Claude Code

cli

● Read(schedule.ts)
- if (hours > 12)
+ if (hours > MAX_HOURS)

> add a break reminder

Ghostty

terminal

~/kvile on main
❯ git status -s
 M ports/xcode/README.md
?? ports/dank-linux/

Alacritty

terminal

❯ ls ports
alacritty/ ghostty/ kitty/
neovim/    vscode/  xcode/
README.md

WezTerm

terminal

CPU ||||||||||....... 34%
MEM |||||||......... 1.8G
NET |||............ 12M

iTerm2

terminal

zshssh

❯ docker ps
NAME     STATUS
web      Up 2 hours
db       Up 2 hours

Windows Terminal

terminal

PowerShellUbuntu

PS C:\kvile> npm test
✓ palette (14 tests)
✓ contrast (31 tests)

Terminal (macOS)

terminal

ctp@mac kvile % printenv

TERM=xterm-256color

fish

shell

~/kvile git commit -m "calm"
~/kvile gti status
fish: Unknown command: gti

zsh

shell

ls -la
drwxr-xr-x themes
-rwxr-xr-x install.sh
▸ kvile-natt.zsh

Dank Linux

desktop

Google Chrome

browser

Helium

browser

Brave

browser

Microsoft Edge

browser

Vivaldi

browser

GNOME Terminal

terminal

❯ sudo apt update
Get:1 security.ubuntu.com
Reading package lists... Done

rootshell

terminal

❯ ssh pi@home
Last login: Fri
pi@home:~$ uptime
 up 41 days

Konsole

terminal

ShellBuild
❯ make -j8
[ 62%] Building kvile.o
[100%] Built target kvile

Xfce Terminal

terminal

❯ df -h /
Size  Used  Avail
 94G   31G   58G

Tilix

terminal

❯ git log --oneline
a3f9c2d calm the number color
7be1044 add dusk variant

Terminator

terminal

~/kvile $ grep -rn "TODO" .
palette.js:42: TODO tune chroma
1 match

PuTTY

terminal

login as: deploy
deploy@srv:~$ systemctl status
● kvile.service active

mintty

terminal

$ git status
On branch main
nothing to commit

Hyper

terminal

zsh
▲ npm run dev
ready - started on 3000
compiled in 212ms

Termite

terminal

❯ ls -F
src/  docs/  run.sh*
LICENSE  README.md

Guake

terminal

❯ htop
PID  CPU%
412  3.1  node
977  12.4 kvile

Warp

terminal

❯ deploy staging
✓ built in 8s
✓ live at staging.kvile.dev

Vim

editor

function! Rest()
  echo "take a break"
endfunction

Emacs

editor

(defun kvile-rest ()
  (message "take a break"))
;; calm by default

Sublime Text

editor

rest.py
def rest(hours: int):
    return hours < 8

JetBrains IDEs

editor

fun rest(hours: Int) =
  hours < MAX
// IntelliJ, WebStorm, PyCharm...

Notepad++

editor

rest.js
const max = 8;
if (h > max) stop();

gedit

editor

#include <stdio.h>
int main(void) {
  puts("rest");
}

Helix

editor

fn rest(h: u8) -> bool {
    h < 8
}
NORrest.rs1:12

Zed

editor

rest.rslib.rs
pub fn rest(h: u8) {
    println!("{h}");
}

Firefox

browser

tmux

cli

❯ nvim
──────────
01:vim*2:zsh22:56

Zellij

cli

 Tab #1 
❯ cargo test
test result: ok. 14 passed

Yazi

cli

▸ ports/
  wallpapers/
  install.sh
  README.md

Starship

cli

~/kvile on main [!2] via node 22
❯ took 1.2s

lazygit

cli

Files  Branches  Commits
 M README.md
A  font.mjs
?? notes.txt

dircolors

cli

drwxr-xr-x src
-rwxr-xr-x build.sh
lrwxrwxrwx latest
-rw-r--r-- notes.md

Xresources

cli

! xterm, urxvt
*.background: #0d151b
*.foreground: #d1d8df
*.color4:     #57a3f7

Slack

app

#design
mira 10:41 new palette is live
✓ 3 replies

Insomnia

app

GET  /api/themes
200 OK 42 ms
{ "name": "Kvile" }

Obsidian

app

# Notes on rest
- [[calm]] palette
- #design ==highlight==

highlight.js

web

const rest = (h) =>
  h < 8 ? "ok" : "stop";

Eight accents, one job each.

Every color has a single meaning in every app, so your eyes learn it once. The accents are tuned to the same lightness and chroma, so none of them shouts.

keywords#bdb1fe#ac8cb9#683f9f#a7afff

strings#85c38f#3dc2a0#477d3e#57cba3

functions#57a3f7#5d9de5#0a73cb#a8d8ff

types#01dfd5#46cef3#076767#1ff5ce

numbers#e29e2c#c88c3b#b75001#efbb70

constants#cdc94b#d0ba53#6c4e00#dfde4f

regex#ca87b4#f49bd0#935891#e294d5

errors#eb7b5f#f18c7e#8f3e48#fe8f7b

Checked for contrast

Text and accents are measured against their background in every variant.

Checked for color vision

The accents stay distinct under deuteranopia, protanopia and tritanopia.

One source

All 52 apps are generated from a single palette file, so a change reaches every app at once.

Palette and accessibility details

Wallpapers to match.

Soft dots on a honeycomb, in each variant. Every theme comes in 14 sizes for desktop, phone and watch.

Kvile Natt desktop wallpaper — Kvile Natt

Kvile Skumring desktop wallpaper — Kvile Skumring

Kvile Kontrast desktop wallpaper — Kvile Kontrast

Free e-book · 60 pages

The science behind the calm.

Color theory for people who build on screens, and the reasoning behind every Kvile decision. Written for developers, with the real numbers and the code.

How a screen makes color, and how eyes and brains read it
Why HSL misleads and OKLCH works
What contrast ratios measure, and why Kvile also sets a ceiling
Color vision deficiency: simulation, distance checks and the tuning that keeps eight syntax colors apart
Every decision and its limits, plus a checklist and working code

Download PDF Download EPUB

Read it in your browser, or take it along as PDF (0.7 MB) or EPUB (0.6 MB) for Apple Books, Kobo, Kindle (via Send to Kindle) and most readers. Free, no sign-up. Get Kvile early access

Early access, $39 once.

Kvile is in early access. The price goes up when every app has been checked in the real app. Early buyers keep every update.

Free

Kvile Natt for the most used apps: VS Code, Neovim, Terminal, iTerm2, Ghostty and Xcode
The Natt wallpapers

Early access

$39 one time

All four variants: Natt, Skumring, Dag and Kontrast
All 52 apps, editors to command-line tools
Wallpapers in 14 sizes for every variant
Every future update, no subscription

Palette and accessibility details