{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.blue","code":"thing-q1088","url":"https://ver.cy/models/thing/q1088/","name":"blue","alternateNames":["cyan-blue","duck-egg blue","petrol blue","azure","robin egg blue","blue-gray","dull blue","slate blue","steel blue","Bondi blue","Turkish blue","blue bell"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The colour between violet and cyan in the visible spectrum, around 450-495 nm, perceived as the colour of a clear sky, with shades from azure to petrol blue.","purpose":"Let an agent specify blue precisely and handle its meanings in signalling and design, and its accessibility.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["A hue between violet and cyan","Mandatory action colour in safety signs","Historically rare and costly pigments","Blue light has health and display considerations"],"structure":{"bundles":[{"id":"specification","name":"Specification","description":"Which blue.","layers":[{"id":"value","name":"Value","description":"Colour values.","findings":[{"id":"value-finding","name":"Value","description":"Exact value.","questions":[{"text":"Which exact blue is meant, in which colour space?","kind":"measurement"},{"text":"Which named shade is closest?","kind":"definition"}]}]},{"id":"standard","name":"Standard","description":"Safety blue.","findings":[{"id":"standard-finding","name":"Standard","description":"Standardised blue.","questions":[{"text":"Does a standard define this blue?","kind":"provenance"},{"text":"What tolerance applies?","kind":"measurement"}]}]}]},{"id":"signalling","name":"Signalling","description":"Blue as a signal.","layers":[{"id":"meaning","name":"Meaning","description":"Mandatory signs.","findings":[{"id":"meaning-finding","name":"Meaning","description":"Meaning in context.","questions":[{"text":"What does blue mean in this sign system?","kind":"definition"},{"text":"Is a pictogram used too?","kind":"boundary"}]}]},{"id":"lights","name":"Lights","description":"Emergency lights.","findings":[{"id":"lights-finding","name":"Lights","description":"Blue lights.","questions":[{"text":"Which vehicles may use blue lights here?","kind":"boundary"},{"text":"What must drivers do?","kind":"action"}]}]}]},{"id":"accessibility","name":"Accessibility","description":"Contrast.","layers":[{"id":"contrast","name":"Contrast","description":"Ratio.","findings":[{"id":"contrast-finding","name":"Contrast","description":"Contrast ratio.","questions":[{"text":"What is the contrast ratio with its background?","kind":"measurement"},{"text":"Does it meet WCAG?","kind":"boundary"}]}]},{"id":"deficiency","name":"Colour vision","description":"Tritan.","findings":[{"id":"deficiency-finding","name":"Colour vision","description":"Colour-vision check.","questions":[{"text":"How does it appear with blue-yellow deficiency?","kind":"measurement"},{"text":"Is a redundant cue provided?","kind":"action"}]}]}]},{"id":"materials-and-culture","name":"Materials and culture","description":"Pigments and meaning.","layers":[{"id":"pigments","name":"Pigments","description":"Sources.","findings":[{"id":"pigments-finding","name":"Pigment","description":"Pigment.","questions":[{"text":"Which pigment makes this blue?","kind":"definition"},{"text":"Is it lightfast and safe?","kind":"boundary"}]}]},{"id":"culture","name":"Culture","description":"Meanings.","findings":[{"id":"culture-finding","name":"Meaning","description":"Cultural meaning.","questions":[{"text":"What does blue signify in the target culture?","kind":"definition"},{"text":"Is it tied to institutions or brands?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Name and specify shades of blue in standard colour systems.","Check that blue text or signals have enough contrast for readers."],"mustNot":["Use blue as the only cue in safety signals or interfaces without a second cue.","Misstate the colour of goods so that buyers are misled.","Misrepresent the cultural or religious meanings of blue in a community."],"requiresHuman":["Changing colours on official safety signs or emergency lighting."]},"ethics":{"considerations":["People with colour vision deficiency can miss colour-only information.","Colours carry political and religious meanings in many places."],"affectedParties":["People with colour vision deficiency","Readers and users of interfaces"]},"owners":{"steward":"Nobody owns a colour; standards bodies keep reference colour specifications.","roles":[],"masterSystems":[]},"relations":[{"target":"Q140932400","type":"parent","note":"registry parent class"},{"target":"color","type":"related","note":"hue"},{"target":"safety sign","type":"related","note":"mandatory"},{"target":"pigment","type":"related","note":"blue pigments"},{"target":"green and cyan","type":"related","note":"boundary hues"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.blue","Wikidata: Q1088 (https://www.wikidata.org/wiki/Q1088)","RAL code: 5000 series industrial blues"]},"properties":{"applicability":"not-applicable","items":["dominant wavelength: 450-495 nm"]},"recognition":{"applicability":"optional","items":["Hue angle around 200-250 degrees in HSL","Named shades: azure, duck-egg blue, petrol blue","Safety blue for mandatory signs","The hue of a clear sky and deep sea; shades range from cyan-blue to navy."]},"capabilities":{"applicability":"required","items":["specify it in a colour space","use it in signs and design","produce it with pigments or light","check contrast"]},"hazards":{"applicability":"required","items":["Low contrast of dark blue on black","Blue-yellow deficiency (rare)","Some historical pigments are toxic"]},"interfaces":{"applicability":"required","items":["ISO 3864 safety colours","WCAG contrast"]},"context":{"applicability":"required","items":["Signalling information and mandatory actions, and expressing meanings in design and culture.","shades: azure, navy, cobalt, petrol blue","pigments: ultramarine, cobalt blue, Prussian blue, YInMn blue","safety blue (ISO 3864)"]}},"sources":[{"title":"Wikidata item Q1088: blue","url":"https://www.wikidata.org/wiki/Q1088","note":"identity and sense of the item"},{"title":"Wikipedia: Blue","url":"https://en.wikipedia.org/wiki/Blue","note":"general description of the item"}],"openQuestions":["Which reference blue should the registry use?","How should cultural meanings be recorded?","Should blue pigments be separate entries?"],"resources":{"spec":"/models/things/publications/thing-q1088/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1088/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T05:54:41Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:53+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}