Published
red
vr.tr.red · thing-q3142
Let an agent specify red precisely and handle its strong conventional meanings, especially in safety signalling.
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 red.
Value
Colour space values.
Colour value
The exact value.
- Which exact red is meant, in which colour space? measurement
- Which named shade is closest? definition
Tolerance
Acceptable variation.
Tolerance
The tolerance for matching.
- How much variation is acceptable? measurement
- Does a standard fix the value, such as for safety red? provenance
Signalling Red as a signal.
Safety meaning
Stop and prohibition.
Safety use
The standard meaning.
- What does red mean in this safety context? definition
- Is it backed up by shape or text? boundary
Traffic signals
Stop lights.
Signal spec
Signal colour specifications.
- Does the signal red meet the specification? measurement
- Is it distinguishable for colour-blind drivers? boundary
Accessibility Seeing red.
Colour vision deficiency
Protan and deutan.
Colour-blind check
How it appears to colour-blind viewers.
- How does this red appear to people with red-green deficiency? measurement
- What redundant cue is provided? action
Contrast
Text and background.
Contrast ratio
The contrast ratio.
- What is the contrast ratio with its background? measurement
- Does it meet WCAG? boundary
Materials and culture Making red and what it means.
Pigments
Sources of red.
Pigment
The pigment used.
- Which pigment or dye makes this red? definition
- Is it lightfast and safe? boundary
Cultural meaning
Meanings across cultures.
Meaning
Meanings in the target culture.
- What does red signify in the target culture? definition
- Could it send an unintended message? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.QLT
- Other names and narrower kinds
- cadmium orange, Tyrian purple, reddish-brown, carmine, chili pepper, Pantone 179 C, bordeaux, Tǔ huángsè, rusty red, Dawn Red, enji, purplish red
What it is Filled
The colour at the long-wavelength end of the visible spectrum, roughly 620-750 nm, perceived as the hue of blood or ripe tomatoes, with many shades from carmine to bordeaux.
Why it exists Filled
Let an agent specify red precisely and handle its strong conventional meanings, especially in safety signalling.
Distinguishing features Filled
- A hue, not a pigment
- The safety colour for prohibition, stop and fire equipment
- Hard to distinguish from green for people with red-green colour vision deficiency
- Meanings differ across cultures
What robots and AI may and may not do Filled
Must not
- Rely on red against green alone to carry meaning.
- Use red so widely that warnings lose their meaning.
- Recommend historical red pigments containing lead or mercury for unprotected use.
Only with a human decision
- Changing red signals or markings in safety systems such as traffic or alarms.
May
- Specify a red by its colour space values or wavelength range.
- Use red for warnings consistently, with a second cue such as text or shape.
Moral aspects Filled
- Red marks danger and stop signals; diluting it puts people at risk.
- Red carries different cultural meanings, from luck to mourning.
Who is affected
- Colour-blind people
- Road and machine users
Owners Filled
Steward
Nobody owns the colour; standards bodies define safety and signal reds.
Links to other meta-models Filled
parent
- Q1075 - registry parent class
related
- color - a hue
- safety sign - prohibition and fire
- pigment - red pigments and dyes
- orange and purple - boundary hues
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.red
- Wikidata: Q3142 (https://www.wikidata.org/wiki/Q3142)
- hex code: #FF0000 for pure sRGB red web
- RAL code: 3000 series industrial reds
Direct properties not applicable Not applicable
- dominant wavelength: 620-750 nm
Plane XCT: no invented physical properties.
Recognition optional Filled
- Hue angle around 0-20 degrees in HSL, or dominant wavelength 620-750 nm
- Named shades: scarlet, crimson, carmine, bordeaux, Tyrian purple at the edge
- Codes such as sRGB #FF0000 or Pantone 179 C
- The hue of blood, fire engines and stop signs; shades range from orange-red to purple-red.
Capabilities and actions required Filled
- specify it, in a colour space or system
- use it, in signals and design, under safety conventions
- produce it, with pigments or light
- check contrast, for people with colour vision deficiency
Hazards and failure modes required Filled
- Red-green confusion for colour-blind users
- Overuse diluting warning meaning
- Toxic historical red pigments such as lead and mercury compounds
Standards and interfaces required Filled
- ISO 3864 safety colours
- CIE traffic signal colour specifications
- WCAG guidance against colour-only information
Context of use required Filled
- Signalling danger, stop and prohibition, and expressing meanings from love to warning in design and culture.
- shades: scarlet, crimson, carmine, vermilion, bordeaux, reddish-brown
- pigments: cadmium red, iron oxide, carmine, sinopia
- safety red in ISO 3864 and RAL 3000 range
Sources Filled
- Wikidata item Q3142: red - identity and sense of the item
- Wikipedia: Red - general description of the item
Open questions
- Which reference red should the registry use?
- How should cultural meanings be recorded without stereotyping?
- Should red pigments be separate entries?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3142/spec.json