Design-system focus roles
Test a proposed focus color before applying it across components and themes.
Focus ring contrast
Check focus ring contrast against adjacent colors.
Enter a focus ring color, page background, and component fill to test whether the ring has 3:1 UI contrast against both adjacent colors. Hue Codex previews a focused button, reports ring-versus-page and ring-versus-component contrast, and exports a copy-ready focus ring report for keyboard accessibility review.
Free color utility
Focus Rings
Inputs update live, exports are copy-ready, and the color math stays deterministic.
Focus state
Ring visibility
Instructions
- Enter the focus ring color, page background color, and component fill color you want to test.
- Use Suggest to generate a ring color with stronger visibility.
- Review the focused button preview and contrast results to check the ring against nearby surfaces.
- Copy the focus ring report for accessibility QA, component specs, or design-system documentation.
How it fits
From color value to usable system.
Hue Codex treats each color as part of a larger workflow: conversion, accessibility, palette roles, CSS syntax, shareable URLs, and production exports.
Deterministic math
Color conversion follows CSS Color 4 conventions, including D50 Lab/LCH, D65 OKLab/OKLCH, and WCAG contrast thresholds.
Readable outputs
Every result is formatted for clear reading, project notes, documentation, and assistive technology.
Free sharing
Palette URLs can be bookmarked and sent without an account, making color decisions easy to revisit.
Quick overview
Hue Codex Focus Ring Contrast Tool is a free browser-based tool that checks a focus ring color against both the page background and component fill. It calculates ring-versus-page and ring-versus-component contrast ratios, marks each against a 3:1 UI contrast target, previews the focused state, and exports a copy-ready focus ring report.
- Use the focus ring contrast tool to test whether a keyboard focus indicator stands out from adjacent colors.
- The ring is checked against both the page background and the component fill because a visible outline often touches both.
- The tool reports pass or fail against a 3:1 UI contrast target for each adjacent color.
- The Suggest control picks a preset ring color based on the page background, but the component ratio still needs review.
- A visible focus state also needs enough size, shape, placement, and consistency beyond color contrast alone.
What the Hue Codex focus ring contrast tool does
The Hue Codex focus ring contrast tool checks a proposed focus ring color against the two colors it commonly touches: the page background around the component and the component fill inside the outline.
The preview shows a focused button using your page, component, and ring colors. The result panel reports ring versus page contrast, ring versus component contrast, and a 3:1 UI contrast target so you can document the focus state clearly.
Focus ring contrast definition
Focus ring contrast is the visual difference between a focus indicator and the adjacent colors around it, such as the page background and the focused component surface.
The 3:1 UI contrast target
Hue Codex uses a 3:1 target for focus ring checks because focus indicators are non-text interface cues. The tool treats each adjacent color separately: a ring can pass against the page but fail against the component, or the other way around.
| Check | What it compares | Why it matters |
|---|---|---|
| Ring vs page | Focus ring color against the surrounding page background. | Shows whether the outside edge of the ring is visible around the component. |
| Ring vs component | Focus ring color against the component fill. | Shows whether the inside edge of the ring stands apart from the focused control. |
| Target | 3:1 UI contrast for both adjacent color comparisons. | Gives a practical threshold for visible non-text focus indicators. |
Why adjacent colors matter
A focus ring is usually drawn at the boundary between a component and its surroundings. If the ring only contrasts with one side, part of the indicator can disappear, especially on filled buttons, cards, inputs, dark surfaces, or complex layouts.
That is why the tool asks for both page and component colors. The ring should remain visible at both edges when the user moves through the interface with a keyboard.
- Use the page color for the surface outside the focused component.
- Use the component color for the fill or background inside the focused control.
- Check both ratios before promoting the ring color to a reusable role.
- If one side fails, adjust the ring color, ring thickness, offset, component fill, or surrounding surface.
Best uses for focus ring contrast checks
Focus ring contrast checks are most useful when designing reusable component states. A single ring color may appear on buttons, links, inputs, cards, menu items, tabs, and controls with different fills.
Button and input states
Check whether the ring is visible on filled controls, outlined controls, and plain text controls.
Dark and light themes
Compare the same ring color against different page and component colors before reusing it across themes.
Accessibility QA
Copy the report into keyboard navigation reviews, bug tickets, design notes, or release QA documentation.
Focus indicator caveats
Contrast is only one part of a usable focus indicator. Size, shape, thickness, offset, animation, persistence, and location all affect whether keyboard users can track focus reliably.
A 3:1 contrast result is a useful signal for the colors in this tool, but the final focus state should still be reviewed in the real component, at real sizes, across hover, active, disabled, selected, light-theme, dark-theme, and forced-colors contexts.
Quick answers
Focus Rings FAQ
What is the Hue Codex focus ring contrast tool?
Hue Codex Focus Ring Contrast Tool is a free browser-based tool that checks a focus ring color against page and component colors, previews the focused state, and reports both contrast ratios.
What contrast ratio should a focus ring have?
Hue Codex checks focus ring colors against a 3:1 UI contrast target for both the page background and the component fill.
Why does the tool check ring versus page and ring versus component?
A focus ring often touches both the outside page surface and the focused component. Checking both sides helps catch rings that disappear against one adjacent color.
What does ring versus page mean?
Ring versus page is the contrast ratio between the focus ring color and the surrounding page background color.
What does ring versus component mean?
Ring versus component is the contrast ratio between the focus ring color and the focused component fill color.
What does the Suggest button do?
The Suggest button chooses a preset ring color with strong contrast against the page background. The ring still needs to be checked against the component fill.
Does passing 3:1 guarantee an accessible focus state?
No. Passing contrast is important, but focus accessibility also depends on thickness, size, placement, persistence, and the real component context.
Can I copy the focus ring report?
Yes. The tool exports the focus ring, page background, component fill, ring-versus-page contrast, and ring-versus-component contrast.