Do placeholder texts need 3:1 or 4.5:1?

Placeholder text is text content, so it technically requires 4.5:1, but best practice is to use persistent labels above inputs instead.

Do inactive or disabled buttons need 3:1 contrast?

No, inactive UI components are explicitly exempt from WCAG 1.4.11 contrast requirements.

What contrast must a focus ring have?

Focus rings must have at least 3:1 contrast against both the component and the surrounding background.

Accessibility & A11y Tools• SC 1.4.11

UI Component & Non-Text Contrast Validator

Web accessibility extends beyond text. WCAG 2.1 SC 1.4.11 requires at least 3:1 contrast for user interface components like inputs, toggles, borders, and graphical elements.

Private in-browser computation.

Color Controls

Foreground (Text / Element)

Background Surface

Calculated Ratio

13.98: 1

AA Normal Text

PASS (4.5:1)

AA Large Text (18pt+)

PASS (3.0:1)

AAA Normal Text

PASS (7.0:1)

UI & Icons (SC 1.4.11)

PASS (3.0:1)

Accessible Typography & UI Preview

This interactive box previews your selected foreground and background colors in real time. Good visual contrast ensures your content remains effortless to read for all visitors, including those in high-glare environments.

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How to Use UI Component Contrast Validator

Select Component Type

Choose between Input Border, Active Button, Icon, or Focus Ring.

Set Component & Background Colors

Select the border/icon color and the adjacent background color.

Inspect 3:1 Compliance

Check if the component meets the 3:1 contrast threshold with interactive component rendering.

About UI Component Contrast Validator

Measures luminance contrast between adjacent visual elements (such as an input border against both the internal field background and external page background) to guarantee 3:1 visibility.

Supported Formats

HEXRGB

Operational Limits

•Decorative elements without functional purpose are exempt from SC 1.4.11.

Key Features

Strict evaluation against WCAG 2.1 SC 1.4.11 (3:1 minimum ratio)
Interactive mockups for input boxes, checkboxes, icons, and focus rings
State testing: Default, Hover, Focused, and Active border states
Luminance calculation and step-by-step ratio output
CSS snippet generation for compliant border and outline styling

Frequently Asked Questions

It mandates that visual information required to identify UI components and visual states must have a contrast ratio of at least 3:1 against adjacent colors.

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