Prompt the safe zone
Ask for a quiet center-left field and place the focal subject or strongest light in the outer third.
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Codex background images
Create a Codex background image that fits the interface.
The best Codex background is designed around what will cover it. It offers a calm field under navigation and task surfaces, places the meaningful subject toward a safe outer region, and includes enough visual context to survive three desktop ratios.
Design perspective
Make the visual idea survive the work.
Prompt guidance should describe composition as carefully as style: 16:10 landscape, 3200 × 2000, no text, no fake interface, a quiet center-left reading field, and important detail in the outer third. This prevents most expensive crop failures before upload.
After generation, the system should validate format and dimensions, show multiple previews, and create explicit derivative assets. The original should remain traceable, with user-confirmed rights and a retention policy that is easy to understand.
Adaptation guide
Generate for the workspace, not the gallery
Ban generated text
Specify no words, letters, logos, watermarks, code, or fake UI; add approved marks later as separate assets.
Validate before packaging
Check file type, dimensions, orientation, and crop quality before generating the final pack.
Record usage rights
Require confirmation that the user owns or may use the uploaded image and preserve that record with the delivery.
Best for
- Custom themes generated from a written visual brief
- Brand atmospheres with separately supplied logos
- Landscape illustrations with broad negative space
Watch for
- Portrait sources and central faces
- Generated text, watermarks, or interface fragments
- Uploads without known usage rights
Free starting points
Try the direction before going custom.
Practical answers
Questions worth answering before you choose.
What prompt should I use for a Codex background?
Specify a 3200 × 2000, 16:10 landscape composition with a quiet center-left reading field, focal interest in the outer third, broad shapes, no text, no logos, no watermark, and no fake interface.
Can the website crop my image automatically?
It can create useful 16:10, 16:9, and 4:3 derivatives, but you should preview each one. Automatic cropping cannot invent missing context or rescue a poorly placed subject.
Does Codex natively support custom background images?
Do not treat advanced backgrounds as a native Appearance feature. They use the optional unofficial local compatibility layer and remain separate from Codex's built-in settings.
Continue the brief
Related Codex theme guides.
Platforms and setup
Design a Codex desktop theme for real window shapes.
A desktop theme is not a wallpaper pasted under an interface. Navigation, task surfaces, dialogs, side-by-side windows, and display changes cover different parts of the composition, so the pack needs several intentional assets and a stable contrast strategy.
Read the guide →Platforms and setupKnow what belongs in Codex Appearance settings.
Theme language can hide an important distinction. Native choices that Codex exposes in Appearance are different from a downloadable pack's visual tokens, and both are different from an advanced background supplied by an unofficial local compatibility layer.
Read the guide →Theme stylesA glass Codex theme that stays readable.
Glass works when translucency creates hierarchy instead of haze. The strongest version uses one atmospheric edge, opaque-enough work surfaces, and borders that remain visible over both bright and dark parts of the artwork.
Read the guide →Use casesA branded Codex theme with a lighter touch.
A branded workspace should feel designed by the company, not wrapped in an advertisement. The useful brief translates brand color, atmosphere, and graphic language into surfaces that still respect code, controls, status colors, and long-session comfort.
Read the guide →