Penumbra is Grey Area's third album, released on Plusquam Records (PQ036) in 2003.
The CD features 10 tracks. 7 tracks are exclusive to this release: "Sombre", "Routine", "Modular drift", "Hiver", "Immacule eight" and 2 more. This is the first release for 1 track later found elsewhere: "". Its track "", first released in 2002, is a well-known favourite, appearing on 3 releases across the archive.
- 01Grey Area — Sombre
- 02Grey Area — Semantics
- 03Grey Area — Slowly
- 04Grey Area — Routine
- 05Grey Area — Penumbra
- 06Grey Area — Modular drift
- 07Grey Area — Hiver
- 08Grey Area — Immacule eight
- 09Grey Area — Long distance
- 10Grey Area — At last
