This thesis examines advanced approaches to design accessible user interfaces, with a particular focus on adapting digital solutions for users with colour vision deficiencies. The aim of the research was to analyse existing accessibility guidelines and practices and to explore how a systematic design approach can improve clarity, structure and overall user experience in mobile applications.
The theoretical section outlines the historical development of user interface accessibility, key accessibility guidelines and contemporary approaches such as universal design, inclusive design and interface personalization. Special attention is given to visual impairments, particularly those related to colour perception.
In the experimental part, a development-oriented research approach was applied. Based on the analysis of the target group, a prototype of a mobile application for a music festival was designed. The information architecture, typography, and visual system were structured to ensure that information was not communicated solely through colour differentiation. Particular emphasis was placed on sufficient contrast between text and background, as well as on the use of icons and clear visual hierarchy to support comprehension. Accessibility was evaluated through contrast ratio measurements and simulations of different types of colour vision deficiencies.
The results demonstrated that consistent implementation of accessibility principles and a carefully structured visual system significantly improved interface clarity and reduced reliance on colour as the primary carrier of information. The findings confirm that integrating accessibility considerations in the early stages of the design process is essential for the development of inclusive digital solutions.
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