What's my JND?
a colour guessing game
Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.
Want to reach these readers? Sponsor an issue.
https://www.keithcirkel.co.uk/too-much-color/
HN · launched Mar 10, 2026 · 56 upvotes (top 15%) · 1 view
Niche: browser puzzle games · 310 launches, 26 in the last 7 days ▼ -7% · Explore this niche →
Category and tags
- Horizontal
- Content generation
- B2C
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 310 launches in browser puzzle games →
Could you build this?
Yes It is a single-page interactive color perception game running color-difference math (OKLab / Delta E OK) on HTML canvas or CSS elements.
Discussion
20 comments analyzed.
Competitors mentioned: The Music Lab - similar tone discrimination test, Keith Cirkel's JND test
Concerns raised: Display quality and color space conformance affects results, Human perception varies by color - some examples feel impossible while others trivial, Oklab JND terminology confusing and potentially inaccurate compared to CIELAB, Colors outside sRGB gamut get clipped differently on various displays, Selection bias in who posts scores
Feature requests: Add "Same color" button option for some tests, Use canvas instead of div to prevent cheating via console inspection, Avoid high saturation colors (>60%) to reduce out-of-gamut issues
Competitors
Other products that read as similar to this one : 230 launches clear the similarity bar, closest 8 shown.
Attention rank: #31 of 231 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 132 days after the earliest competitor.
- How well can you remember these colors? · hn · 2026-02-19 · 5 upvotes · similarity 0.48
- Colorgram · github · 2026-09-22 · 7 upvotes · similarity 0.46
- I'm color blind, so I built a way to show people how I see · hn · 2026-10-02 · 6 upvotes · similarity 0.46
- Huely, Daily Color Game · ph · 2026-10-31 · 1 upvotes · similarity 0.45
- Clue Me · hn · 2026-09-24 · 5 upvotes · similarity 0.44
- FIBBLIX · ph · 2026-09-21 · 2 upvotes · similarity 0.43
- Color Personality Test · ph · 2026-09-21 · 1 upvotes · similarity 0.43
- Color template website · ph · 2026-11-09 · 1 upvotes · similarity 0.42
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.