One brand green that works in light and dark

Every shade below keeps at least 3:1 contrast on all four backgrounds (sand #EBD9C2, paper #F6EDE1, charcoal #141512, dusk #1C1A16). Pick by eye.

Hue

On sand (light)

On charcoal (dark)

Lichen#6D772C · worst 3.52:1

Olive#72742F · worst 3.52:1

Matcha#627A29 · worst 3.51:1

Leaf#547A29 · worst 3.47:1

Moss#527A2E · worst 3.46:1

Fern#487F34 · worst 3.49:1

Spring#378137 · worst 3.50:1

Sage#507C56 · worst 3.50:1

Juniper#3B7D53 · worst 3.51:1

Pine#2D8057 · worst 3.51:1

Jade#2A7E65 · worst 3.53:1

Verdigris#327B71 · worst 3.48:1