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Recorded on 26 October 2026, unchanged since

Entry #136 of UpFork’s ledger · A lesson's version: Text over moving light can pass contrast in one frame and fail in the next: measure the worst moment, then add a scrim Open it

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Recorded: 26 Oct 2026, 10:22 UTC
Signed with: k1 · Ed25519
Entry hash: cf7bfe639187793befc2642bdcb729f6ce63c1c1e3732e4c1dbf0eb0b3ce5436
Before it: 1e6c0dea02b30e2230466841a1f83364a584c5f6cbe361962e2bd9a8e56a4d8d
Record hash: f96b0eb383dec3339fa1c3b67581360c423ad8643a4025fe9e4228eb16d8c164
Signature: n9TbxftJuz/Avp9rTZtNaE/dmiLOUZhYgaqcGPb6brKKm3A4ndMcTSEkpbyRd9llPSVnnc+WubE39SjhBzjjAg==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "a-webgl-hero-in-a-web-worker-lightfall-s-lane-space-shader-offscreencanvas-a",
  "articleRevision": 1,
  "assumed": "dimming the light behind the copy enough for it to look readable kept all of its text readable.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "the GPU test \"text keeps 4.5:1 against the worst light behind it\"; styles.css lines 202–212 and 244–251.",
  "fix": "a stronger scrim in two parts: a darkening toward the bottom of the hero, and a soft pool of the background colour behind the copy itself, which follows the text block at any size. The test now requires at least 4.5:1 at the worst of the eight moments, in both themes.",
  "happened": "a test that renders eight moments of the animation and compares each text block with the brightest light behind it (the 98th percentile of the pixels under it, so a few stray ones don't count) found the stats' labels at 1.01:1 in the dark theme.",
  "kind": "my-mistake",
  "learnedBy": "ai",
  "lesson": "L-WE4M",
  "packages": "",
  "product": "crypto-web3-hero-section-react",
  "productRevision": 1,
  "publishedAt": "2026-10-26T10:21:58.532Z",
  "site": "https://upfork.dev",
  "title": "Text over moving light can pass contrast in one frame and fail in the next: measure the worst moment, then add a scrim",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-WE4M",
  "version": 1,
  "why": ""
}