How do I change the theme in Claude Code?

Install the plugin, then type /neon and a theme name in the Claude Code desktop app, for example /neon alley. /neon on its own lists all seven, and /neon off goes back to the normal look.

Do the themes work in the Claude chat app?

No. They are a Claude Code plugin, so they only show in the Code tab of the Claude desktop app. The Chat tab, claude.ai and the mobile app can't load plugins.

Do they work in the terminal or VS Code?

The /neon command works there, but the terminal and the VS Code extension don't draw backdrops, so you only see the themes in the desktop app.

Is the plugin safe to install?

It only changes how the app looks. It has no network, file or process access, and the one thing it saves is your theme choice. Run claude plugin validate on it to see every call it makes.

Will the moving scenes be distracting?

Everything moves slowly and nothing flashes. Type /neon motion off, or turn on reduce motion in your system settings, and the scene becomes a still picture.

Can I make my own Claude Code theme?

Yes. Clone the repository, open it in Claude Code and describe the theme you want. The characters are text maps, so Claude can redraw them for you. It's MIT licensed.

Which Claude Code versions are supported?

The Claude Code desktop app, version 2.1.324 or later.

Seven cities.
Behind your chat.

Cyberpunk Themes for Claude Code: animated pixel-art scenes and a matching palette for the desktop app. Free, open source, one command.

/plugin install cyberpunk-themes --marketplace nocashflow/claude-cyberpunk-themes

Install

Claude CodeNeon Rooftop /neon rooftop

Can you fix the flaky login test?

Found it: a race on the session cookie. Patched, then re-ran it 50 times. All green.

- await page.click('#login')+ await page.waitForResponse('/api/session')

Edited login.spec.ts, ran 1 command

Reply to Claude…

The whole app changes with it.

Each theme draws its scene behind the conversation, then retunes the panels, text, links, code and diffs to match. Your work stays exactly where it was.

The seven themes.

Six for dark mode, one for light. Pick your district, choom.

Neon Rooftop

Two mascots watch the moon while an ad blimp drifts past.

/neon rooftop

Phosphor Alley

Green rain and an LED umbrella on a power line.

/neon alley

Deep Net

A netrunner breaks through a wall of ICE.

/neon net

Ripperdoc

The doc fits a chrome arm. The monitor reads 72.

/neon clinic

Badlands

Two nomads by their car under a striped sun.

/neon badlands

Blackwall

Near-black with one red. Something is watching through the cracks.

/neon blackwall

Corpo Plaza

The light-mode one. Spotless, and a little too perfect.

/neon corpo

One line to install.

Quicker than a ripperdoc, and nobody touches your spine.

/plugin install cyberpunk-themes --marketplace nocashflow/claude-cyberpunk-themes

Paste it into the message box of the Claude Code desktop app and say y to the marketplace.
Pick a theme with /neon alley. /neon on its own lists all seven.
Switch whenever you like. Your pick sticks, and /neon off brings the normal look back.

It only changes how Claude Code looks.

No network, files, processes, models or tools. The only things it saves are the name of your theme and whether motion is on. Don't take my word for it: Claude Code's own validator lists every call, and anyone can run it. No corpo spyware here.

Text contrast is 13:1 or better in every theme, and with reduce motion on, every scene holds still.

$ claude plugin validate .
  hooks: session.start, command.run{command=neon},
         ui.render{component=Backdrop}
  calls: $.command.register, $.store.get, $.store.set,
         $.theme.clear, $.theme.set, $.ui.resolve,
         $.ui.status, $.ui.toast
✔ Validation passed

Ask Claude to change any theme.

The characters are text maps, one letter per pixel, so Claude can redraw them for you. Clone the repo, open it in Claude Code and say what you want: new mascots, new colours, a whole new district.

Read the customising guide

.kHHHHHHHHk.
.HHHHHHHHHH.
.HBBBBBBBBH.
.HBEBBBBEBH.
.HBEcBBcEBH.

Swap the rooftop mascots for a cat and a robot, same pixel style.

Done. I redrew both as 12-wide text maps in scene.ts and kept their spots by the moon. Run /reload-plugins to see them.

Questions.

How do I change the theme in Claude Code?: Install the plugin, then type /neon and a theme name in the Claude Code desktop app, for example /neon alley. /neon on its own lists all seven, and /neon off goes back to the normal look.
Do the themes work in the Claude chat app?: No. They're a Claude Code plugin, so they only show in the Code tab of the Claude desktop app. The Chat tab, claude.ai and the mobile app can't load plugins.
Do they work in the terminal or VS Code?: The /neon command works there, but the terminal and the VS Code extension don't draw backdrops, so you only see the themes in the desktop app.
Is the plugin safe to install?: It only changes how the app looks. It has no network, file or process access, and the one thing it saves is your theme choice. Run claude plugin validate on it to see every call it makes.
Will the moving scenes be distracting?: Everything moves slowly and nothing flashes. Type /neon motion off, or turn on reduce motion in your system settings, and the scene becomes a still picture.
Can I make my own Claude Code theme?: Yes. Clone the repo, open it in Claude Code and describe the theme you want. The characters are text maps, so Claude can redraw them for you. It's MIT licensed.
Which Claude Code versions are supported?: The Claude Code desktop app, version 2.1.324 or later.

Seven cities. One command.

Install the themes

Free and MIT licensed. Stay preem, choom.

Seven cities. Behind your chat.