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gray card

reflectance reference used in photography
Product photo_equipment Q1361722
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gray card

Summary

gray card is a photo equipment[1]. It draws 53 Wikipedia views per month (photo_equipment category, ranking #1 of 2).[2]

Key Facts

  • gray card's image is recorded as Graukarte.svg[3].
  • gray card's instance of is recorded as photo equipment[4].
  • gray card's instance of is recorded as shade of grey[5].
  • gray card's Commons category is recorded as Gray cards[6].
  • gray card's sRGB color hex triplet is recorded as 777777[7].
  • gray card's Freebase ID is recorded as /m/027fzkp[8].
  • gray card's Quora topic ID is recorded as Gray-Card[9].
  • gray card's Microsoft Academic ID is recorded as 2778225608[10].
  • gray card's Dictionary of Archives Terminology ID is recorded as gray-card[11].
  • gray card's Dictionary of Archives Terminology ID is recorded as neutral-test-card[12].

Why It Matters

gray card draws 53 Wikipedia views per month (photo_equipment category, ranking #1 of 2).[2] It has Wikipedia articles in 8 language editions, a strong signal of global cultural recognition.[13] It is known by 3 alternative names across languages and contexts.[14]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . Freebase Data Dumps. wikidata.org.
  7. [9] ↑ . Quora. wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] ↑ . Wikidata sitelinks. wikidata.org.
  3. [14] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). gray card. Retrieved May 3, 2026, from https://4ort.xyz/entity/gray-card
MLA “gray card.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/gray-card.
BibTeX @misc{4ortxyz_gray-card_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{gray card}}, year = {2026}, url = {https://4ort.xyz/entity/gray-card}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): gray card — https://4ort.xyz/entity/gray-card (retrieved 2026-05-03)

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