Published
green
vr.tr.green · thing-q3133
Let an agent specify green precisely and handle its conventional meanings in safety and signalling, and its accessibility issues.
Thing Registry Cross-cutting context XCT.QLT
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Specification Which green.
Value
Colour values.
Value
Exact value.
- Which exact green is meant, in which colour space? measurement
- Which named shade is closest? definition
Standard
Safety green.
Standard
Standardised greens.
- Does a standard fix the value here? provenance
- What tolerance is allowed? measurement
Signalling Green as a signal.
Meaning
Safety meaning.
Meaning
Meaning in context.
- What does green mean in this safety context? definition
- Is shape or text also used? boundary
Signals
Traffic and status lights.
Signal spec
Signal specification.
- Does the signal green meet its specification? measurement
- Is it distinguishable from red for colour-blind users? boundary
Accessibility Seeing green.
Colour vision deficiency
Deutan.
Check
How it appears.
- How does it appear to people with deuteranopia? measurement
- What redundant cue exists? action
Contrast
Ratios.
Contrast
Contrast ratio.
- What is the contrast ratio with its background? measurement
- Does it meet WCAG? boundary
Materials and culture Making green and meaning.
Pigments
Sources.
Pigment
Pigment used.
- Which pigment makes this green? definition
- Is it toxic, as historical arsenic greens were? boundary
Culture
Meanings.
Meaning
Cultural meanings.
- What does green signify in the target culture? definition
- Is it tied to a political or religious meaning? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.QLT
- Other names and narrower kinds
- Smelly body discharge, shade of green, green-cyan, celadon green, aquamarine, illuminating emerald, brunswick green, blue-green, chartreuse, sulu, green-yellow, light grass green
What it is Filled
The colour between yellow and cyan in the visible spectrum, around 495-570 nm, perceived as the colour of fresh foliage, with many shades from celadon to Brunswick green.
Why it exists Filled
Let an agent specify green precisely and handle its conventional meanings in safety and signalling, and its accessibility issues.
Distinguishing features Filled
- A hue between yellow and cyan
- Safety colour for safe condition and first aid
- Confused with red by people with red-green deficiency
- Meanings differ across cultures
What robots and AI may and may not do Filled
Must not
- Convey information by green alone in signals or interfaces where red-green colour blindness matters.
- Recommend historical green pigments known to be toxic for use without warning.
- Present green as having a single fixed meaning across all cultures and contexts.
- Use green labelling to imply environmental benefit that has not been shown.
Only with a human decision
- Choosing safety colours for signs or signals that people rely on.
May
- Describe green shades by name and standard colour coordinates.
- Check colour contrast and suggest accessible alternatives for green text or signals.
Moral aspects Filled
- Many people cannot tell green from red; design that relies on it excludes them.
- Green is widely used to suggest environmental virtue, which can mislead.
Who is affected
- People with colour vision deficiency
- Users of signs and interfaces
- Consumers
Owners Filled
Steward
Nobody: a colour is held in common; standards bodies define colour spaces and safety colours.
Links to other meta-models Filled
parent
- Q140932400 - registry parent class
related
- color - hue
- safety sign - safe condition
- red - for colour-blind people
- pigment - green pigments
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.green
- Wikidata: Q3133 (https://www.wikidata.org/wiki/Q3133)
- RAL code: 6000 series industrial greens
Direct properties not applicable Not applicable
- dominant wavelength: 495-570 nm
Plane XCT: no invented physical properties.
Recognition optional Filled
- Hue angle around 90-150 degrees in HSL
- Named shades: emerald, celadon, Brunswick green, aquamarine at the edge
- Codes such as sRGB #00FF00 or safety green RAL 6032
- The hue of leaves and grass; shades range from yellow-green to blue-green.
Capabilities and actions required Filled
- specify it, in a colour space
- use it in signals, under safety conventions
- produce it, with pigments or light
- check it for colour-blind users
Hazards and failure modes required Filled
- Red-green confusion
- Toxic historical pigments such as Scheele green
- Poor contrast
Standards and interfaces required Filled
- ISO 3864 safety colours
- CIE signal colour specifications
- WCAG
Context of use required Filled
- Signalling safety, go and permission, and expressing nature and other meanings in design and culture.
- shades: emerald, olive, celadon, Brunswick green
- pigments: chromium oxide, phthalo green, historical copper greens
- safety green in ISO 3864
Sources Filled
- Wikidata item Q3133: green - identity and sense of the item
- Wikipedia: Green - general description of the item
Open questions
- Which reference green should the registry use?
- How should cultural meanings be recorded?
- The registry entry has a merged alias about body discharge; should it be removed?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3133/spec.json