Theming Cursor CLI and Aider in 2026

If you spend your day in Cursor's CLI agent or pairing with Aider, you've probably searched for a Cursor CLI theme at some point and come back disappointed. These are coding agents first. Their output is colored diffs, status lines, and confirmation prompts — not a canvas you can repaint. So the real question isn't "how do I theme Cursor CLI," it's "what part of the experience can I actually theme, and where do I do it."

The honest answer: a little lives inside the agent, most of it lives in the terminal around the agent, and the part that makes a session feel like yours lives in the shell you run it in. This post walks all three. It's the companion to our Codex and Gemini CLI theming guide — same approach, different agents.

What you can actually theme in Cursor CLI and Aider

Before you chase a config flag that doesn't exist, get the layers straight. There are three, and they're owned by three different things.

The agent's own output. Cursor CLI and Aider both emit colored text — diffs, file paths, edit summaries, prompts. They read your terminal's ANSI color palette for most of this. Aider exposes a handful of explicit color settings on top. Cursor CLI gives you less.
The terminal emulator. This is where your real "theme" lives: the 16 ANSI colors, background, foreground, cursor, font, padding. Every tool running inside inherits it.
The shell prompt. Starship, Powerlevel10k, oh-my-posh, your own dotfiles. This is the line next to the agent — the part you stare at all day.

Most people think they want a Cursor CLI theme. What they actually want is layers two and three dialed in, so the agent sits inside something that looks deliberate.

Theming Aider: the colors it actually exposes

Aider is the friendlier of the two here, because it's open source and it gives you real knobs.

Aider lets you set colors for user input, assistant output, tool output, and edit diffs through its config — either flags or a .aider.conf.yml in your home directory or project root. The settings you'll reach for most:

--user-input-color and --assistant-output-color to separate what you typed from what the agent said.
--tool-output-color, --tool-error-color, --tool-warning-color for the status chatter.
--code-theme, which controls syntax highlighting in fenced code using Pygments-style theme names (think monokai, default, solarized-dark).
--dark-mode / --light-mode as quick presets that flip sensible defaults so colors stay legible on your background.

Set them once in .aider.conf.yml and every session inherits them. That's a genuine Aider theme — not skin-deep, but real. Pick a --code-theme that matches your terminal's palette and the diffs stop fighting your background.

One caveat: if you've spent any time searching "aider theme" hoping for a full visual makeover, temper that. These are color assignments, not a design system. The vibe still comes from the terminal underneath.

Setting a Cursor CLI theme: lean on the terminal

Cursor's CLI agent is the leaner case. It's optimized for getting edits into your repo, and its surface area for customization reflects that. You won't find a deep palette config the way Aider has one.

So you do the practical thing: you theme the terminal it runs in, and Cursor CLI inherits it. Switch your emulator's color scheme to something high-contrast and the agent's diffs, prompts, and file paths all come along for the ride — because they're drawn with the ANSI colors you just set. That's the whole trick. A "Cursor CLI theme" in 2026 is really a terminal theme plus a good prompt.

If you want concrete schemes that read well behind a busy agent — enough contrast for diffs, not so much it strobes — we collected the ones worth using in terminal themes that don't suck. Start there, then drop Cursor CLI inside.

Pick your setup by what you care about

Pick the terminal-emulator route if: you want one theme that covers Cursor CLI, Aider, Codex, Gemini, and your plain shell at once. Set the palette in iTerm2, Ghostty, WezTerm, or whatever you run, and every agent inherits it. Lowest effort, broadest coverage. This is the right answer for most people.

Pick Aider's color config if: Aider is your daily driver and you want input, output, and diffs visually separated inside that tool specifically. Worth the ten minutes in .aider.conf.yml.

Pick a styled shell prompt if: the thing that bugs you is the line next to the agent, not the agent itself. Starship plus a Nerd Font gives you git status, language versions, and icons that match your palette. The agent doesn't change, but the frame around it finally looks intentional.

Pick a skinnable shell if: you want the whole window — not just colors — to feel like a workspace. That's where MOLTamp comes in.

The easy path: skin the shell, not the agent

Here's the part nobody optimizes for. You can spend an afternoon tuning Aider colors and a Starship prompt and still be staring at a plain gray rectangle.

MOLTamp is an Electron shell built specifically to run AI CLI agents — Cursor CLI, Aider, Claude Code, Codex, Gemini. Instead of editing config files, you apply a skin and the entire window changes: colors, background, an audio visualizer that reacts to output, a music player, widgets. You run Cursor CLI or Aider inside it exactly as you would anywhere else — same binary, same flags, your .aider.conf.yml still applies — but now it lives in something designed to look good.

It's not a terminal-emulator replacement and it's not an AI tool. It's the visual layer. The agent does the work; MOLTamp makes the room it works in feel like yours. There's a Cursor CLI setup page and an Aider one with the specifics.

It's free forever. There's a periodic support popup; a one-time $20 Pro unlock removes it. That's the whole model.

A sane order of operations

If you're starting from scratch, do it in this order and stop whenever it looks good enough:

Set a terminal color scheme. Covers every agent at once. Biggest payoff per minute.
Add a prompt (Starship + a Nerd Font). Fixes the line next to the agent.
Tune Aider's colors in .aider.conf.yml if Aider is your main tool.
Want more than colors? Run it all inside a skinnable shell and stop editing config files.

FAQ

How do I set a Cursor CLI theme?

Cursor's CLI agent doesn't ship a deep theming config — it reads your terminal's colors. So a Cursor CLI theme in practice means setting a color scheme in your terminal emulator (or running it inside a skinnable shell), and the agent's diffs and prompts inherit it. Pair that with a styled shell prompt and the session looks deliberate without touching the agent itself.

Can I change the Aider theme and colors?

Yes — Aider is the more configurable of the two. Set an Aider theme through flags or .aider.conf.yml: --code-theme for syntax highlighting, plus --user-input-color, --assistant-output-color, and the tool-output colors to separate input from output from diffs. --dark-mode and --light-mode are quick presets that keep everything legible against your background.

Is there a CLI visualizer that reacts to agent output?

Not as a built-in feature of Cursor CLI or Aider — they're coding agents, not media apps. If you want a CLI visualizer (an audio visualizer or animated widgets reacting while the agent runs), you get that from the shell layer. MOLTamp includes audio visualizers and widgets you can run any CLI agent inside, which is the practical way to add one in 2026.

What's the easiest way of theming AI CLI agents across the board?

Set your terminal emulator's color palette once — it covers Cursor CLI, Aider, Codex, Gemini, and Claude Code together, since they all draw with the same ANSI colors. That's the lowest-effort, highest-coverage move for theming AI CLI agents. Layer a Starship prompt on top, and switch to a skinnable shell only if you want the whole window, not just colors.

Theming agents is still an early, scrappy category — most of the "theme" lives in the terminal and prompt, not the agent, and that's fine once you know where to look. Get your terminal palette and prompt right first; it's free and it covers everything. If you'd rather skin the window than edit config files, browse the skins and run Cursor CLI or Aider inside MOLTamp. No pressure either way — pick what fits how you work.