Games like Colorless
Games like Colorless include Portal 2, Chained Together, Viewfinder, LIMBO, and Trine 2: Complete Story. We matched them by the tags players give Colorless on Steam (Adventure, Casual, Action-Adventure, Puzzle, and Platformer): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle · Platformer · First-Person

Chained Together
Shared: Adventure · Casual · Platformer

Viewfinder
Shared: Puzzle · Puzzle Platformer · Adventure

LIMBO
Shared: Puzzle · Puzzle Platformer · Platformer

Trine 2: Complete Story
Shared: Action-Adventure · Puzzle Platformer · Platformer

FEZ
Shared: Puzzle · Platformer · Adventure

Portal
Shared: Puzzle · Puzzle Platformer · First-Person

FAR: Changing Tides
Shared: Action-Adventure · Adventure · Puzzle Platformer

Supraland
Shared: Adventure · Puzzle Platformer · First-Person

Climb The Backrooms
Shared: Adventure · Casual · Puzzle

A Story About My Uncle
Shared: Adventure · First-Person · Platformer

Human Fall Flat
Shared: Puzzle · Adventure · Puzzle Platformer

Little Nightmares II
Shared: Adventure · Puzzle · Action-Adventure

FAR: Lone Sails
Shared: Adventure · Puzzle · Post-apocalyptic

Indiana Jones and the Great Circle
Shared: Action-Adventure · Adventure · Puzzle

Nihilumbra
Shared: Adventure · Casual · Puzzle

Laughing to Die
Shared: Adventure · Casual · Puzzle

VLADiK BRUTAL
Shared: Adventure · First-Person · Casual

Pikuniku
Shared: Adventure · Casual · Puzzle

Moncage
Shared: Casual · Puzzle · Adventure

Moss VR
Shared: Adventure · Puzzle · Action-Adventure

COCOON
Shared: Adventure · Puzzle · Puzzle Platformer

Defy Gravity Extended
Shared: Platformer · Puzzle Platformer · Puzzle

Donut County
Shared: Casual · Puzzle · Adventure