{"adoption": {"forks": 210, "observed_at": "2026-08-28T04:06:51.480932+00:00", "stars": 2437}, "canonical_url": "https://ross.abutalabs.com/products/contrast-ratio", "card": {"archived": false, "artifact_type": "application", "description": "A tool to calculate the contrast ratio between any two valid CSS colors.", "domain": ["accessibility", "web-design", "frontend"], "enriched": true, "function": ["accessibility", "ui-components"], "health_score": 20, "homepage": "https://www.siegemedia.com/contrast-ratio", "language": "JavaScript", "license": "MIT", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["siege-media/contrast-ratio"], "name": "siege-media/contrast-ratio", "platform": ["browser"], "pushed_at": "2024-05-08T14:54:20+00:00", "repo": "siege-media/contrast-ratio", "stars": 2437, "tags": ["wcag", "color-contrast", "css-colors", "checker-tool", "color", "web"], "topics": [], "urls": [], "use_cases": ["check if my text and background colors pass WCAG AA contrast", "calculate contrast ratio between two hex colors", "find accessible color combinations for website text", "verify color contrast for Lighthouse accessibility audit", "test contrast ratio for large vs normal text", "check semi-transparent background color contrast"], "what_it_is": "A web-based tool that calculates the WCAG contrast ratio between two CSS colors to check text readability compliance. Originally created by Lea Verou and now maintained by Siege Media as the basis for their hosted contrast ratio checker.", "when_to_avoid": ["you need automated accessibility scanning of a whole website", "you need programmatic contrast calculation in your build pipeline", "you need to audit contrast beyond color pairs (e.g., full page audits)"], "when_to_choose": ["you need a quick visual checker for WCAG color contrast compliance", "you want to test arbitrary CSS color formats including alpha transparency", "you need a free browser-based tool without installation"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/contrast-ratio", "repo": "siege-media/contrast-ratio", "role": "main", "score": 23}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.480932+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T02:31:00.734415+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "44a77c2a1086a5dd1c9d287d241b18ec296f0105a797e16b750bb8301af1c508", "fetched_at": "2026-08-28T04:06:51.480932+00:00", "kind": "readme", "missing": false, "url": "https://github.com/siege-media/contrast-ratio"}, {"content_hash": "37fea6ee50d7c5a657e601697d9407582b0a7de950ee92112aeda96215cfa862", "fetched_at": "2026-08-29T10:12:36.753343+00:00", "kind": "homepage", "missing": false, "url": "https://www.siegemedia.com/contrast-ratio"}, {"content_hash": "2d385d48685b6c2891589076027b12eebd1a0f8c8e62a98e3e3dc0887bde9f6f", "fetched_at": "2026-08-29T10:12:36.762569+00:00", "kind": "site_page", "missing": false, "url": "https://www.siegemedia.com/about"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 5072, "days_push": 847, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 23, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}