The Best Dark Ghost Theme for AI and Tech Publications
If you're running an AI or tech publication on Ghost, you've noticed the problem. Most Ghost themes are light backgrounds, sans-serif fonts, and generic card grids. They're built for lifestyle bloggers and newsletter writers. They get repurposed for tech content, and they look it.
A publication covering LLMs, ML infrastructure, and software engineering needs a different aesthetic. Dark by default. Structured for multiple content categories. Built for readers who spend their day in VS Code, Notion dark mode, and Linear.
Why a dark Ghost theme matters for tech content
Dark mode isn't cosmetic for a tech audience. It's expected. The tools they use are dark. The publications they respect (The Verge, Ars Technica, many indie AI newsletters) use dark or dark-optional designs. A white background with large serif headings signals "lifestyle" or "news" - not "technical depth."
Casper offers a light/dark/auto toggle. That's something, but the design is still a personal blog layout. Source doesn't have dark mode at all. Neither theme offers the editorial structure a multi-category publication needs.
What AI and tech publications actually need from a theme
Dark editorial aesthetic. Not just "dark mode enabled" - designed dark from the start. Color system, surface elevations, and typography all built for dark backgrounds.
Category sections on the homepage. If you cover AI, engineering, and infrastructure, those are different audiences. A single chronological feed buries your depth. Category sections let readers self-select by interest before they subscribe.
Long-form post design. Technical editorial runs long. Posts need callout cards (tip, warning, critical, success, note), code blocks with syntax highlighting, properly styled tables, and accordion components. A blog theme gives you paragraphs and images. That's not enough for technical content.
Content tier visibility. If you run a freemium publication, free vs. paid content should be obvious on every card. Not buried inside the post after someone clicks. Readers should know what's free and what's premium at a glance.
The callout card problem
"Tip" and "Warning" boxes are standard in technical documentation and editorial. They break up dense content. They signal important information. They're how technical writers communicate urgency and supplementary context.
Ghost's default themes don't style callout cards. The Ghost editor supports them (tip, warning, success, error, info variants), but Casper and Source render them as basic colored blocks with minimal differentiation. For a tech publication, that's a gap. You're either writing flat prose or pasting custom HTML into code injection.
A proper implementation styles each variant distinctly - icon, label, background color, border treatment - so readers can scan and understand the callout type at a glance. Inside a dark theme, this requires careful color work to maintain readability without blowing out the eye.
One feed vs. multiple sections
If your publication covers LLMs, cloud infrastructure, and software engineering, a single chronological feed buries your depth. A reader interested in AI coverage has to scroll past infrastructure posts to find what they want. A reader interested in engineering has to do the same.
Category sections on the homepage let each topic area stand on its own. AI posts in one section. Engineering in another. Infrastructure in a third. Readers self-select. It looks like a publication with editorial sections, not a blog with a single feed.
Neither Casper nor Source supports this. Both are single-feed themes. Source has a featured posts strip, but that's not category sections.
What to check on a dark Ghost theme demo
Before buying any dark Ghost theme for a tech publication, check these things on the demo:
- Kitchen sink page - does one exist? Does it show callout cards, code blocks, tables, accordions, and embeds all styled in the dark aesthetic?
- Tag pages - are they just a label and a card grid, or do they have their own layout with banner image and description?
- Membership tier visibility - do post cards show free/premium badges, or is the tier hidden until you click through?
- Typography under load - read a 2,000-word post on the demo. Not just the homepage. Does the typography hold up for long-form reading on a dark background?
- Accent color system - can you change the accent color from Ghost admin, or is it hardcoded?
Cortex: built for the use case
Cortex is a dark editorial Ghost theme designed specifically for AI and tech publications. Dark by default - not a toggle, the actual default aesthetic. Emerald accent (#10B981), configurable from Ghost admin.
The homepage has a featured article hero, category sections (AI, Engineering, Infrastructure), and a latest posts grid. Tag pages have banner images and descriptive subtitles. Post pages include five callout card variants, styled code blocks, custom tables, and accordion components - all designed for the dark editorial look.
Premium and Members badges appear on post cards. Readers see what's free and what's paid before they click. The sign-in page is styled and on-brand - magic link auth, not a Portal overlay.
Playfair Display for headings, Inter for body. The combination signals editorial weight without sacrificing technical readability. It reads like a publication, not a blog.
Who this is for
AI newsletters going beyond Substack and building a proper publication. Solo engineers or founders writing technical content for a niche audience. Indie media projects covering LLMs, ML infrastructure, and software architecture. Anyone who looked at Ghost's default themes and thought: not serious enough.
If you're building a casual blog, Casper is fine. It's free. If you're building a publication - something people should pay for - you need a theme designed for it.