Doom One Monochrome Theme for Obsidian

A Doom Emacs “Doom One”–inspired monochrome theme for Obsidian, designed for people who want their notes to feel like Org mode inside Doom.

This is not a flashy theme. It’s intentionally restrained, semantic, and editor-first.

Philosophy

Monochrome-first UI with a single primary accent (Doom Blue)
Semantic colour usage, not rainbow syntax
Org-mode–style emphasis, where formatting conveys meaning
Reduced UI noise for long writing and thinking sessions

If you like Doom Emacs because it gets out of your way, this theme aims to do the same.

Key Features

Authentic Doom One palette
Single accent colour for headings, links, and UI focus
Separate code accent to keep prose readable
Org-style emphasis mapping: (these are my mappings, I would change if I were you)
- Bold → strong off-white
- Italic → Doom blue
- Inline code → Doom purple
- ==Verbatim / highlight== → Doom yellow
- ~~Strikethrough~~ → Doom red emphasis
No underlined links (Doom-style)
Subtle hierarchy for headings, tables, blockquotes, and UI chrome

Typography

Monospaced by default (JetBrains Mono / Iosevka recommended)
Tuned line height and font sizes for writing, not dashboards

Installation

Copy the CSS into:

.obsidian/snippets/doom-one-monochrome.css

Enable the snippet in: Settings → Appearance → CSS Snippets

Recommended Pairings

This theme pairs especially well with:

Obsidian Vim mode
Doom-style keybindings
Zen / Stille / Focus modes
Org-like note structures

Built for Doom users who now live in Obsidian, but refuse to give up taste.

/* =========================================================
   Doom One – Full Monochrome Obsidian Config
   ========================================================= */

/* -----------------------------
   Core Doom Palette
   ----------------------------- */

:root {
  /* Doom One colours */
  --doom-bg: #282c34;
  --doom-bg-alt: #21242b;
  --doom-fg: #bbc2cf;
  --doom-fg-dim: #5b6268;

  /* Primary accent (UI, headings, links) */
  --doom-accent: #51afef; /* Doom Blue */

  /* Code-only accent */
  --doom-code-accent: #98be65; /* Doom Green */

  /* Borders */
  --doom-border: #1c1f24;

  /* Fonts */
  --doom-font-mono: "JetBrains Mono", "Iosevka", monospace;
}

/* -----------------------------
   Obsidian Theme Variables
   ----------------------------- */

body {
  --background-primary: var(--doom-bg);
  --background-secondary: var(--doom-bg-alt);
  --background-modifier-border: var(--doom-border);

  --text-normal: var(--doom-fg);
  --text-muted: var(--doom-fg-dim);
  --text-faint: var(--doom-fg-dim);

  --interactive-accent: var(--doom-accent);
  --interactive-accent-hover: var(--doom-accent);

  --link-color: var(--doom-accent);
  --link-color-hover: var(--doom-accent);

  font-family: var(--doom-font-mono);
}

/* =========================================================
   Editor (Live Preview + Reading)
   ========================================================= */

.cm-content,
.markdown-preview-view {
  font-family: var(--doom-font-mono);
  font-size: 14px;
  line-height: 1.6;
}

/* Cursor */
.cm-content {
  caret-color: var(--doom-accent);
}

/* =========================================================
   Org-Mode-Like Headings
   ========================================================= */

.cm-header,
.markdown-preview-view h1,
.markdown-preview-view h2,
.markdown-preview-view h3,
.markdown-preview-view h4,
.markdown-preview-view h5,
.markdown-preview-view h6 {
  color: var(--doom-accent);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Subtle hierarchy (org-like) */
.markdown-preview-view h1 { font-size: 1.6em; }
.markdown-preview-view h2 { font-size: 1.4em; }
.markdown-preview-view h3 { font-size: 1.25em; }
.markdown-preview-view h4 { font-size: 1.15em; }

/* =========================================================
   Code Blocks & Inline Code (Different Accent)
   ========================================================= */

.cm-inline-code,
.markdown-preview-view code {
  color: var(--doom-code-accent);
  background: var(--doom-bg-alt);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  font-size: 0.95em;
}

pre,
.markdown-preview-view pre {
  background: var(--doom-bg-alt);
  border: 1px solid var(--doom-border);
  padding: 1em;
  border-radius: 6px;
}

/* =========================================================
   Emphasis (Bold / Italic)
   ========================================================= */

.cm-strong,
.markdown-preview-view strong {
  color: var(--doom-accent);
  font-weight: 600;
}

.cm-em,
.markdown-preview-view em {
  color: var(--doom-accent);
}

/* =========================================================
   Doom-Style Links (No Underline)
   ========================================================= */

a {
  color: var(--doom-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
  opacity: 0.85;
}

/* =========================================================
   UI Noise Reduction
   ========================================================= */

.workspace-ribbon,
.titlebar {
  opacity: 0.85;
}

/* Active tab */
.workspace-tab-header.is-active {
  color: var(--doom-accent);
}

/* File explorer */
.nav-file-title.is-active {
  color: var(--doom-accent);
  font-weight: 600;
}

/* Status bar */
.status-bar {
  background: var(--doom-bg-alt);
  color: var(--doom-fg-dim);
  border-top: 1px solid var(--doom-border);
}

/* =========================================================
   Selection
   ========================================================= */

::selection {
  background: rgba(81, 175, 239, 0.25);
}

/* =========================================================
   Tables (Clean & Minimal)
   ========================================================= */

.markdown-preview-view table {
  border-collapse: collapse;
}

.markdown-preview-view th,
.markdown-preview-view td {
  border: 1px solid var(--doom-border);
  padding: 0.4em 0.6em;
}

/* =========================================================
   Blockquotes (Org-style subtle)
   ========================================================= */

.markdown-preview-view blockquote {
  border-left: 3px solid var(--doom-accent);
  padding-left: 1em;
  color: var(--doom-fg-dim);
  background: transparent;
}
/* =========================================================
   Doom Org-Style Emphasis Mapping
   ========================================================= */

/* *bold*  → off-white, heavy */
.cm-strong,
.markdown-preview-view strong {
  color: #DFDFDF;
  font-weight: 800;
}

/* _italic_ → doom blue */
.cm-em,
.markdown-preview-view em {
  color: #51afef;
  font-style: italic;
}

/* =verbatim= → doom yellow, underlined */
.cm-highlight,
.markdown-preview-view mark {
  color: #ECBE7B;
  background: transparent;
  text-decoration: underline;
  font-weight: 700;
}

/* ~code~ → doom purple */
.cm-inline-code,
.markdown-preview-view code {
  color: #c678dd;
  background: var(--doom-bg-alt);
}

/* +underline bold italic+ → doom red */
.cm-strikethrough,
.markdown-preview-view del {
  color: #ff6c6b;
  text-decoration: underline;
  font-weight: 700;
  font-style: italic;
}

bloodstiller/obsidianDoomOneEmacsTheme.md

Select an option

No results found