# What's my JND? colour guessing game

11 Hacker News commenters recommended What's my JND? colour guessing game and 0 criticized it, November 2025 to November 2026. It was recommended in 1 of 13 months.

**Verdict:** A free browser game where you lock in colour matches, praised as fun, meditative and addictive, with the slider version preferred. Some slider rounds seem impossible.

## Why people recommend it

- Fun, addictive, meditative gameplay (2 comments): "Was fun and kind of meditative locking in like that" ([source](https://news.ycombinator.com/item?id=47457228)) "Very addictive, kudos to the dev" ([source](https://news.ycombinator.com/item?id=47322631))

## What people warn about

- Some slider rounds seem impossible (1 comments): "one or two impossible seeming ones in the slider" ([source](https://news.ycombinator.com/item?id=47330615))

## Alternatives hackers recommend

- [Wonderhop](https://hackerapproved.com/p/wonderhop.md): 23 recommend
- [TNG Episode Guessing Game](https://hackerapproved.com/p/tng-episode-guessing-game.md): 6 recommend

## Cite as

Hacker Approved, "What's my JND? colour guessing game", https://hackerapproved.com/p/what-s-my-jnd-colour-guessing-game/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).