orange
Let an agent handle orange by colour specification, uses such as safety signalling, symbolism and accessibility.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle orange by colour specification, uses such as safety signalling, symbolism and accessibility.
The colour between red and yellow on the visible spectrum, around 590-620 nm, named after the fruit; variants include safety orange, international orange and yellowish or brownish oranges.
What it is for: Design, safety signalling, branding and symbolism.
It can be specify it in colour systems; use it for high-visibility safety; check contrast; understand cultural meanings.
Distinguishing features
Between red and yellow
Highly visible
Used in safety signalling
Symbolism varies by culture
What it looks like
A warm colour between red and yellow.
Physical character
dominant wavelength: about 590-620 nm
How it is recognised
Wavelength about 590-620 nm
Named variants such as safety orange
Hex values such as #FFA500
Related models
is a kind of - category
lies between - spectrum
is used in - safety
is confused with - another sense
In practice
Families and kinds
safety orange
international orange
yellowish orange
brownish orange and amber
Identifiers
sRGB hex #FFA500 (CSS orange) screen colour
ANSI safety orange Z535 colour safety signs
Standards and regulation
EN ISO 20471 high-visibility clothing
ISO 3864 safety colours
WCAG contrast guidelines
Failure modes and hazards
Poor contrast with white text
Colour vision deficiency confusion with red and green
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.orange-substance
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Specification Which orange.
Codes specify colour.
Code
Colour system.
Code
Colour specification.
- Which colour system and code define this orange? definition
- Which variant is it? definition
Perception
Lighting.
Perception
Perception.
- How does lighting change its appearance? definition
- Is it fluorescent? definition
Safety High visibility.
Orange signals caution.
High visibility
Clothing.
High visibility
High-visibility clothing.
- Does the garment meet the high-visibility standard? provenance
- Which class? definition
Signs
Safety colours.
Signs
Safety signs.
- What does orange mean on safety signs here? provenance
- Which standard applies? provenance
Design Accessibility.
Design must be readable.
Contrast
Legibility.
Contrast
Contrast.
- Does text on this orange meet contrast guidelines? boundary
- What ratio? measurement
Colour vision
Deficiency.
Colour vision
Colour vision deficiency.
- Can people with colour vision deficiency tell it apart from red or green? boundary
- Is a second cue used? boundary
Culture Meaning.
Meaning varies.
Symbolism
Associations.
Symbolism
Symbolism.
- What does orange signify in this culture or context? provenance
- Is it tied to a political or religious group? boundary
Senses
Fruit.
Senses
Fruit sense.
- Is the fruit meant instead? boundary
- Which entry fits? action
What the second pass must settle
- Should named oranges be separate entries?
- How should safety colour codes be linked?
- How should the fruit sense be split off?