Tests
A design rule is a claim, and a claim can be measured. Each test takes one rule, measures it on real typefaces and real colours, and publishes the numbers with the method, so anyone can check them.
| No. | Test | Result | Measured |
|---|---|---|---|
| 003 | The lightest grey that still passes | #767676 passes · #777777 fails | 2.10.2026 |
| 002 | How wide is a line of 66 characters? | 393 to 523 px at 16 px | 2.10.2026 |
| 001 | Sixteen pixels is not sixteen pixels | Merriweather 55.5% · EB Garamond 40.5% | 2.10.2026 |
3 tests so far. The first was run on 2.10.2026.