What's my JND?
a colour guessing game
Details
- External ID
- 47321188
- Source
- HN
- Company
- —
- Product
- What's my JND?
- Website domain
- keithcirkel.co.uk
- Launched
- March 10, 2026
- Cohort
- —
- Upvotes
- 56
- Upvotes percentile
- 0.8480934809348093
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
https://www.keithcirkel.co.uk/too-much-color/
Enrichment
- Theme
- indie puzzle games and learning toys
- Vertical
- Horizontal
- Function
- Content generation
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- color perception game
- Manually corrected
- False
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 — 107 launches clear the similarity bar, closest 8 shown.
Attention rank: #17 of 108 (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 0.45
- Clue Me · hn · 2026-09-24 · 5 upvotes · similarity 0.44
- FIBBLIX · ph · 2026-09-21 · 2 upvotes · similarity 0.44
- Color Personality Test · ph · 2026-09-21 · 1 upvotes · similarity 0.43
- Purple Word · hn · 2026-02-06 · 10 upvotes · similarity 0.40
- Simple algorithm and color space to generate diverse skin tones · hn · 2026-08-04 · 627 upvotes · similarity 0.40
- Lost in Color · ph · 2026-09-19 · 1 upvotes · similarity 0.40
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a content generation tool for Government yet.