Colour expression and symbol passing of computer simulation of composite materials in visual communication design

Aiming at the problems of high cost, inaccurate colour prediction and complex symbol expression in traditional visual communication design, this paper simulates composite materials by computer, builds a multi-dimensional simulation environment, and combines high-resolution spectral analysis and other technologies to accurately control material colour and symbol transmission. High-resolution spectral analysis and microscopic imaging techniques can accurately capture the optical properties and microstructure of the composite materials, thus improving the accuracy of the simulation. Experimental verification showed that the computer simulation reduced the colour prediction error by 61.3%, optimised the design scheme, and ensured that the composite material presented consistent and true colours and visual effects across different devices and applications, improving the clarity and visual impact of the visual communication design, while meeting the accessibility and long-term stability requirements.