Insufficient route color contrast.
[1] route_color_contrast rule reference
| Code | route_color_contrast |
|---|---|
| Standard | GTFS |
| Source | MobilityData canonical GTFS Schedule validator |
| Severity | WARNING |
| Category | quality |
| Maturity | draft |
| Tags | mobilitydata, gtfs, quality |
| Retrieved | 2026-06-12 |
| Reference | https://gtfs-validator.mobilitydata.org/rules.html#route_color_contrast |
