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Focus Outline Styler - Online Design Accessible Rings

Accessibility Developer Tools accessibility CSS focus outline
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🎯 Focus Outline Styler

Design accessible, WCAG-compliant focus indicators with live preview & CSS generation

🎨 Focus Method
outline
box-shadow
⭐ Quick Presets
1px8px
012px
Contrast ratio: 12.5:1 — WCAG AAA ✓

Click the element below to toggle focus state — or press Tab

📦 Focusable Element
click or tab to toggle focus
WCAG 2.2 AA Pass Focus: ON
Generated CSS
*:focus-visible { outline: 3px solid #0066cc; outline-offset: 2px; border-radius: 12px; }
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Frequently Asked Questions
What is a focus outline and why does it matter?
A focus outline is a visual indicator that appears around an interactive element (like a button, link, or input) when it receives keyboard focus. It's essential for accessibility — it helps keyboard-only users and people with motor disabilities know which element they're about to activate. Without visible focus indicators, navigating a website becomes extremely difficult for many users.
What does WCAG 2.2 require for focus indicators?
WCAG 2.2 SC 2.4.11 (Focus Appearance, Level AA) requires that focus indicators have a minimum area (at least 2px thick along the shortest side), a contrast ratio of at least 3:1 against adjacent colors, and must not be fully obscured. The older SC 2.4.7 (Level AA) simply requires that focus indicators are visible. We recommend following the stricter 2.4.11 guidelines for better accessibility.
Should I use outline or box-shadow for focus styles?
Both have pros and cons. Outline is the native CSS property for focus indicators — it's simple, well-supported, and has outline-offset for spacing. However, in some older browsers, outlines don't follow border-radius. Box-shadow always follows border-radius perfectly and allows for more creative designs (like glow effects or multi-ring styles), but it requires knowing the background color to create offset spacing. For most cases, we recommend outline with outline-offset as it's cleaner and more semantic.
What's the best CSS selector for focus styles — :focus or :focus-visible?
:focus-visible is the modern best practice. It only shows focus indicators when the user is navigating via keyboard (or assistive technology), not on mouse clicks. This gives a cleaner experience for mouse users while preserving accessibility for keyboard users. Use :focus-visible as your primary selector, and consider a fallback :focus for older browser support. You can also combine them: use a subtle style for :focus and a more prominent one for :focus-visible.
How do I check if my focus outline has enough contrast?
Use this tool! It calculates the contrast ratio between your ring color and the background color using the WCAG relative luminance formula. A ratio of at least 3:1 is required for AA compliance (SC 2.4.11). For AAA-level accessibility, aim for 4.5:1. You can also use browser DevTools or dedicated contrast checkers. The key is ensuring the focus ring is clearly distinguishable from both the element and its surrounding background.
Can I remove focus outlines entirely?
Never use outline: none without providing an alternative. Removing focus outlines without a replacement violates WCAG SC 2.4.7 and makes your site unusable for keyboard-only users. If you must customize the look, always provide a clearly visible alternative — such as a box-shadow ring, a background color change, or a border style change — that meets the 3:1 contrast requirement. Simply removing outlines is one of the most common accessibility failures on the web.
What is outline-offset and when should I use it?
outline-offset controls the space between the element's edge and the focus outline. A positive offset (e.g., 2–4px) creates a gap that makes the ring more visible and prevents it from blending with the element's border. WCAG recommends at least 2px of separation for clarity. Negative offsets can be used for inset effects but may reduce visibility. For box-shadow focus rings, offset is simulated by adding an inner shadow layer matching the background color.
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