Sample
ColorManagement.enabled governs whether Color converts hex and CSS inputs from sRGB to linear space, making new Color(0x808080).r evaluate to ~0.216 rather than 0.502.
sha256:519b769927eb6e0d30204c3cec58a4b7b550e19cf51006b1cd6e06a9ec39f80b
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- ColorManagement.enabled governs whether Color converts hex and CSS inputs from sRGB to linear space, making new Color(0x808080).r evaluate to ~0.216 rather than 0.502. HOW
- Packages
-
three 0.185.1
- Environment
- node
- Created
- 2026-08-17T10:18:36Z
Commonly assumed
Initializing a Color with hexadecimal 0x808080 stores raw normalized channel values (128/255 ≈ 0.502) identically to new Color(0.502, 0.502, 0.502).
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- When ColorManagement.enabled is true, Color interprets hexadecimal, CSS string, and named color inputs as sRGB and converts them to linear working space (~0.216 for 0x808080), whereas numeric constructors assume linear space (~0.502).
- Color.getHex() converts working color space to sRGB, returning 0x808080 for hex-initialized colors but 0xbcbcbc for linear 0.502 numeric inputs.
- Setting ColorManagement.enabled to false bypasses color space conversions, causing new Color(0x808080).r to equal 128/255 (~0.502) and match numeric constructor values.
- Setting ColorManagement.workingColorSpace to SRGBColorSpace keeps sRGB hex inputs unchanged without linear transfer transformation.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9