Color is a crucial component of visual design, in different ways, namely, playing a key role in conveying emotions, enhancing usability, and improving user experience. However, individuals with color vision deficiency (CVD) encounter significant challenges in distinguishing and interpreting color-coded information. This limitation can hinder accessibility and reduce the effectiveness of visual communication, making it essential for designers to develop more inclusive solutions. To achieve this, designers must understand how color perception progressively changes as the severity of CVD increases. However, many professionals lack sufficient knowledge about this phenomenon, and its practical implications remain poorly understood. Without this awareness, design choices may unintentionally exclude CVD individuals, leading to usability barriers. This study addresses the issue by using a perceptual model of color representation to simulate how the color domain narrows as CVD severity increases. By demonstrating how individuals with different degrees of color blindness perceive color, the study offers valuable insights about their challenges and provides designers with practical tools to assess and improve accessibility, ensuring that visual messages remain effective for a broader audience. By integrating these findings into the design process, professionals can create more inclusive and user-friendly interfaces, reducing barriers for CVD individuals and promoting more accessible communicational products.