In the era of digitalization, interactions between consumers and brands have entirely shifted to screen-based platforms, where visual inconsistencies and the application of dark patterns frequently trigger the collapse of a brand's digital credibility. This study aims to analyze the role of visual design elements (color, typography, illustration, and layout) in shaping consumer trust and to examine the contribution of visual identity consistency to brand credibility. The research method used is a narrative literature review with systematic documentation-based data collection from various reputable academic databases such as Google Scholar, Scopus, IEEE Xplore, and JSTOR, which was subsequently analyzed using thematic analysis techniques. The results of the literature synthesis indicate that visual design functions as a strategic communication instrument that activates the cognitive processing fluency mechanism, where clean and professional visuals reduce cognitive load and mitigate online purchase risk perceptions by strengthening the dimensions of reliability, integrity, predictability, and transparency. This study concludes that mature and consistent visual identity management is not merely an aesthetic addition, but a fundamental strategic investment for building long-term emotional connections and consumer loyalty in the digital market.