All guides
Value · Trainer
Value Gym
A round-based eye-training game. You're shown a point on an image and asked to guess its value tier on a slider.
When to use it
Daily, in short bursts. Best for closing the gap between what you think you see and the actual luminance on the page.

How to use it
- 01
Pick an image set and a difficulty — 5 tiers to start, 8 once you're consistent.
- 02
Each round, guess the tier at the marked point.
- 03
Read the reveal: the swatch shown both in context and isolated.
- 04
At the end, check your accuracy and your directional bias.
Watch the bias readout, not just the score. A consistent 'too dark' bias is more actionable than an average.