The game features a large, 2D side-scrolling world where environments are linked through doors. The art style is silhouetted with monochromatic visuals that gradually introduce colours as you progress. You can collect eight different colours, including aqua, blue, lime, orange, pink, purple, red, and yellow, which can be switched between on the fly to interact with the environment. This mechanic allows you to discover hidden doors, obstacles, and other elements by matching their colour.
The story unfolds through envelopes with narration, and while Hue can die, he respawns immediately with no penalty or loss of lives. The game supports colourblind players using symbols as a colour aid, and it's compatible with various coloured LED devices on Windows, including Razer Chroma and Corsair RGB.