The color aesthetics is applied in the design of modern ship cabins, providing an application method with engineering practical value for the color design of ship cabins. Starting from the color aesthetics model, taking the LNG power generation ship in a lake reservoir area as an example, study the color control scheme of the ship cabin design, analyse the application of the color design of the different cabins such as the working cabin and the living cabin, and explore the unity of the color aesthetics and the ship cabin design, to ensure that the cabin can maintain its functions and its design meets the basic principles of color aesthetics. Based on the spatial area environment of the ship cabin, its colors are classified and analyzed, and the overall and local color system of the cabin is constructed to realize the engineering application of color design.