Claude Code /theme: Work Longer with an Eye-Friendly Dark Theme

When you code for a long time, your eyes tire first. Staring at a bright screen makes your eyes sting, and poor color contrast makes text hard to read. Claude Code (an AI coding tool used in the terminal) lets you change the screen colors to suit your eyes. That's the /theme command.

Definition (What It Is)

/theme is a command that changes Claude Code's color theme.

You can choose a theme (the overall color combination of the screen) such as light, dark, or colorblind-friendly (a palette for people who have trouble distinguishing colors). It's a setting that changes, all at once, what colors your code and text appear in on screen.

How to Use It (By Difficulty)

Basic — Pick a Theme

Type it directly into the input box.

/theme

Running it brings up a list of themes to choose from. Move through them with the arrow keys to preview, and press Enter to select and apply it immediately. Once you pick one, that theme stays the next time you launch too.

Real-World Example

There are times when working late at night, the bright screen stabs at your eyes and breaks your focus. Picking a dark theme with /theme reduces the glare, and you feel far less fatigued even after working the same hours.

Taking It Further

• Switching by time of day — light during the day, dark at night — is easy on the eyes.
• If you're colorblind or don't feel color contrast well, try a colorblind-friendly theme. Code highlight colors stand out more distinctly.
• If you often capture and share your screen, a light theme with a bright background can sometimes look cleaner.

Summary

/theme is a command for choosing screen colors that suit your eyes. Eye strain accumulates the longer you work, so picking a comfortable theme at the start is good for productivity too. Feel free to switch things around and find the colors most comfortable for you.

Based on: Claude Code v2.1.154 (2026.05)