To make website colors accessible, check text and non-text contrast separately, avoid using color as the only way to communicate meaning, and test the actual page states people will see. Under WCAG 2.2 AA, ordinary text needs a contrast ratio of at least 4.5:1, large text needs 3:1, and certain interface components and meaningful graphics need 3:1 against adjacent colors. Passing those checks addresses color-related requirements; it does not establish that a whole site conforms to WCAG.
1. Inventory where color carries information
Start with the rendered pages, not just the palette or design tokens. List every place where text or a visual element depends on color to remain readable or understandable. Include:
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- Body copy, headings, labels, placeholder text, and text inside buttons.
- Text over photographs, gradients, patterned backgrounds, and colored panels.
- Inline links, visited links, hover and focus states, and other interactive states.
- Form errors, required-field markers, validation states, and button boundaries.
- Icons, status indicators, chart series, diagrams, and other graphics that communicate meaning.
Check each theme and state separately. A text/background pair that works in a light theme may fail in dark mode, on hover, or when a focus indicator appears.
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WCAG contrast is based on relative luminance, not on how different two hues look. A red and green can be easy to distinguish by hue yet have poor luminance contrast. The applicable threshold depends on what the color is doing.
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- Includes ColorChecker Classic 24 patch target for custom camera profiles, White Balance target for custom in-camera white balance, and two video targets for use in-camera or in post-production video editing software
- An essential tool for any user that requires accurate color control when working in different lighting situations, mixed lighting conditions when capturing still or moving images
- Perfect for matching multiple cameras ensuring a similar color rendition
- Included software Camera Calibration software for photo users offers DNG or ICC custom camera profiles for raw images
- Durable portable protective case adjusts to accommodate multiple positions so you can easily incorporate targets into any scene. Also includes a handy lanyard, so your Passport is always ready for action - redesigned for product identification and custom labeling.
| Use | WCAG 2.2 AA minimum | How to apply it |
|---|---|---|
| Ordinary text and images of text | 4.5:1 | Check the text against its actual background. |
| Large-scale text and images of large-scale text | 3:1 | Large text is at least 18 point regular or 14 point bold—about 24 CSS pixels or 18.5 CSS pixels respectively. |
| Specified UI component and state information, and meaningful parts of graphics | 3:1 | Compare the visual information needed to identify the component, state, or graphic with its adjacent color. |
These are separate tests, not one universal “accessible color” score. Text thresholds come from WCAG Success Criterion 1.4.3; the non-text threshold comes from Success Criterion 1.4.11. The large-text rule concerns rendered text size and weight, so do not infer it from a design file’s point setting alone.
WCAG thresholds are exact boundaries: 4.499:1 does not meet 4.5:1, and 2.999:1 does not meet 3:1. Do not round a result up. For the stricter optional AAA target, ordinary text needs 7:1 and large text 4.5:1.
WCAG 2.2 Success Criterion 1.4.3 has exceptions, including inactive UI text, pure decoration, text not visible to anyone, some text inside pictures containing significant other visual content, and logotypes. Treat these as specific exceptions in the criterion, not as a general exemption for nearby text or interface elements.
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- SPECIFICATIONS: 24 patch color reference target designed for photo and video workflows, supports white balance, exposure evaluation, and color grading, 8 x 11.5 inch chart size, engineered for consistent color reproduction under varied lighting, ideal for Camera profiling and calibration use.
- ACCURATE COLOR CONTROL: 24 scientifically formulated color patches provide a consistent reference for correcting color casts and maintaining true to life results, helping photographers and filmmakers achieve dependable accuracy across different lighting conditions and camera systems.
- WHITE BALANCE REFERENCE: Capture the target under the same light as your subject to set neutral balance and exposure with confidence, reducing trial and error corrections and improving consistency across a full shoot or production day.
- PROFILE CREATION READY: Supports creation of custom DNG and ICC camera profiles when used with Calibrite PROFILER software, helping streamline editing workflows and maintain predictable color rendering for specific camera, lens, and lighting combinations.
- WORKFLOW EFFICIENCY: Provides a reliable point of reference for global corrections and color grading decisions, saving time in post production while improving consistency for multi camera shoots, commercial work, and color critical deliverables.
3. Make meaning clear without color alone
Color must not be the only visual signal for information, an action, a requested response, or a distinction. WCAG 2.2 Success Criterion 1.4.1 states: “Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element.”
- Links: Underline inline links, or give them another visible cue beyond a change in text color.
- Errors: Pair red text or a red border with a clear written error message and, where useful, an icon. Identify which field needs attention.
- Charts: Use direct labels, patterns, symbols, or a nearby text explanation in addition to color-coded series.
- Status: Pair status colors with words or icons so that “warning” or “complete” is not conveyed by hue alone.
- Actions and required fields: Use visible labels, symbols, or instructions in addition to color changes.
Redundant cues help people who cannot distinguish a color difference and also make the page clearer in conditions such as low-quality displays or monochrome printing.
4. Measure actual foreground and background combinations
Use a current digital contrast analyzer to measure each foreground/background pair against the applicable threshold. Record the use (ordinary or large text, UI information, or graphic), the ratio, and the rendered state tested. A color value is not meaningful by itself: the same foreground can pass on one background and fail on another.
Rank #3
- 𝗖𝗢𝗟𝗢𝗥 𝗔𝗖𝗖𝗨𝗥𝗔𝗖𝗬, 𝗗𝗘𝗙𝗜𝗡𝗘𝗗 𝗗𝗘𝗧𝗔𝗜𝗟: Ensure accurate, consistent color from one shot to another, across different cameras, lenses, and lighting environments, plus capture every detail with optimal RAW process in- batch processing
- 𝗕𝗨𝗗𝗚𝗘𝗧 𝗙𝗥𝗜𝗘𝗡𝗗𝗟𝗬, 𝗙𝗘𝗔𝗧𝗨𝗥𝗘-𝗥𝗜𝗖𝗛: It features 24 spectrally engineered color targets and a grey face target, all near/within the sRGB gamut to ensure compatibility with a wide range of devices. Perfect for visual comparisons and custom white balance adjustments.
- 𝗔𝗟𝗜𝗚𝗡 𝗠𝗨𝗟𝗧𝗜𝗣𝗟𝗘 𝗖𝗔𝗠𝗘𝗥𝗔 𝗦𝗬𝗦𝗧𝗘𝗠𝗦: Easy alignment of multiple camera systems, including DSLR, Smartphones, drones and Action Cams - perfect for event photography.
- 𝗦𝗧𝗥𝗘𝗔𝗠𝗟𝗜𝗡𝗘𝗗 𝗪𝗢𝗥𝗞𝗙𝗟𝗢𝗪: Taking a test photo with your Spyder Checkr 24 allows you to capture scene light color and intensity data, so you can color-calibrate your camera with software based HSL-presets, streamlining post-production workflow
- 𝗢𝗡-𝗧𝗛𝗘-𝗚𝗢-𝗣𝗢𝗥𝗧𝗔𝗕𝗜𝗟𝗜𝗧𝗬: Its compact size and protective sleeve make Spyder Checkr 24 a take-with-you-everywhere photo tool – perfect for location shoots, changing light conditions, and multiple camera and lens usage – wherever your camera takes you!
- Choose the actual foreground and adjacent background colors used in the page.
- Identify whether the item is text, qualifying large text, a UI component/state, or a meaningful graphic.
- Compare the numeric result with the correct AA threshold without rounding.
- Repeat for relevant hover, focus, selected, disabled, validation, and theme states.
- Check the rendered page again after changing the palette or component styles.
For text placed over a photograph or gradient, sample or assess the rendered background behind the text. A single design-token pair is not enough if the background varies across the text. A subtle overlay or a solid text panel can make the background more consistent; retest the resulting presentation.
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Thin or unusual fonts can look fainter in practice even when the numeric ratio meets the minimum. W3C advises considering a stronger or thicker font, or using contrast above the minimum, in that situation.
5. Review the page in grayscale, then test more than color
A grayscale view is a useful qualitative check: it can reveal places where a difference disappears when hue is removed. It does not calculate a ratio and cannot replace numeric contrast testing.
Rank #4
- SPECIFICATIONS: Video color target measuring 8 x 11.5 inch with vectorscope and waveform optimized layout including saturated and desaturated chromatic chips, skin tone row, large gray level steps, linear grayscale, illumination check chips, and reverse side spectrally neutral white balance target.
- FASTER CAMERA MATCHING: Designed to help match multiple cameras for consistent color rendition, improving continuity across angles and reducing time spent correcting differences during editing and final grading.
- VECTORSCOPE READY COLORS: Saturated and desaturated chromatic chips align with vectorscope axes for fast color balance evaluation, helping achieve accurate reproduction under mixed or changing lighting environments.
- EXPOSURE AND CONTRAST CONTROL: Large gray steps support waveform, zebras, and false color tools, allowing accurate mid tone placement and consistent exposure matching across cameras and scenes.
- NEUTRAL WHITE BALANCE SIDE: Reverse white balance target provides a spectrally neutral reference for creating in camera white balance, helping footage start at a consistent neutral point across mixed lighting conditions.
W3C/WAI describes three useful approaches, each with limits:
- Analyzer table: Can inspect many color pairs on a page, but may report pairs that are not visible together in the rendered page.
- Eyedropper: Can measure a specific foreground/background pair, but it is one item at a time and may depend on mouse use and visual access.
- Grayscale review: Helps show whether a color-only distinction disappears, but is imprecise and provides no contrast ratio.
These checks cover color-related issues only. They do not test keyboard operation, screen-reader behavior, content structure, or every WCAG criterion. A color tool’s passing result is not proof that a website is accessible or fully WCAG-conformant.
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Say which WCAG version and conformance level you assessed, and distinguish that assessment from legal compliance. WCAG is a W3C Recommendation; which legal or policy requirements apply depends on the jurisdiction and governing framework.
Best Value
- 𝗔𝗖𝗖𝗨𝗥𝗔𝗧𝗘 𝗖𝗢𝗟𝗢𝗥 𝗙𝗥𝗢𝗠 𝗧𝗛𝗘 𝗦𝗧𝗔𝗥𝗧: Essential, pocket-sized color reference tool with an easy-grip ergonomic case design for photographers and image creators.
- 𝗦𝗜𝗠𝗣𝗟𝗜𝗙𝗬 𝗪𝗢𝗥𝗞𝗙𝗟𝗢𝗪: Automatically create HSL presets to use with photo editing software such as Adobe Lightroom Classic, Adobe Camera RAW, or Hasselblad Phocus using Spyder Checkr software.
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- 𝗩𝗘𝗥𝗦𝗔𝗧𝗜𝗟𝗘 - 𝗙𝗢𝗥 𝗔𝗟𝗟 𝗣𝗛𝗢𝗧𝗢𝗚𝗥𝗔𝗣𝗛𝗘𝗥𝗦: 4 interchangeable cards feature more colors for all types of photography: expanded skin tones for portraits; large targets for easy white/grey balancing; 12-step grey scale for perfect exposure and instant dynamic range check.
- 𝗠𝗢𝗥𝗘 𝗖𝗢𝗟𝗢𝗥 𝗧𝗔𝗥𝗚𝗘𝗧𝗦: Comprehensive collection of color targets includes 62 colors: 24 hues + 6 skin tones; 24 grey scales; 2 large grey scales; 3 white adjustments and 3 black adjustments.
For example, Section508.gov says the Section 508 Standards require WCAG 2.0 AA and notes that WCAG 2.1 Success Criterion 1.4.11 has not been incorporated as a Section 508 Standards requirement, although many federal agencies follow it as best practice. Do not describe every WCAG 2.2 criterion as automatically required by Section 508 or by law in every jurisdiction.
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If you need a clean screenshot of the rendered page while reviewing color combinations and states, ScreenshotNeo returns a PNG, JPEG, WebP, or PDF from one GET request. It is a capture aid, not a contrast analyzer or a substitute for accessibility testing; inspect the relevant foreground/background pair and run the appropriate checks.
For example, save a page capture as WebP with cURL:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpSee the ScreenshotNeo API documentation for request parameters and options. ScreenshotNeo accepts cookie or consent banners before capture and removes more than 60 known consent platforms, newsletter popups, and chat widgets; each of those steps can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits cost nothing, and response headers say which page verdict was returned and whether it was billed. Its MCP server provides take_screenshot, get_page_info, and capture_pdf for Claude, Cursor, and other MCP clients. The free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots.
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