UI Theme Generator

What it does

The UI Theme Generator produces complete theme configurations in one object: primary and secondary colors, background and foreground pairs, border radius, shadow definitions, and typography choices. Generate light themes, dark themes, or fully random ones — up to 100 per run, seeded, exported as JSON ready for your theming layer.

Common use cases

• Theme-switching tests — verify your app survives arbitrary theme objects: contrast edge cases, long shadow values, unusual radii (presets for light, dark, and random).
• Design-system plumbing — exercise token pipelines and CSS-variable wiring with disposable but complete themes.
• Prototype styling — a plausible whole theme before the real design exists.
• Multi-tenant demos — a distinct seeded theme per demo tenant, no design work required.

Settings

• Style — light, dark, or random.
• How many — 1 to 100 theme objects per run.
• Seed — the same seed and style regenerate the identical themes — a tenant’s look pinned to one string.

Privacy note

Themes are generated locally in your browser; nothing is uploaded. Output is engineering test data — plausible, complete, and not accessibility-checked design.

FAQ

Can I ship a generated theme? As a starting point — check text/background contrast (WCAG) and adjust before real users see it. The value here is completeness and volume, not taste.

What’s in the theme object? Colors (primary, secondary, background, foreground), radius, shadows, and font choices — the fields a typical theme provider consumes, so it drops into most theming setups.

Just colors or scales instead? Palette generates harmonious color sets, Design Token emits named color tokens, and Design Scale computes spacing/type ramps — this tool bundles the whole outfit.