Anita Vojdani Roshan - Department of Computer Engineering, University of Guilan, Guilan, Iran;
Amirreza Seighali - Department of Computer Engineering, University of Guilan, Guilan, Iran;
Abdorreza Hesam Mohseni - University Lecturer of Computer Engineering, University of Guilan, Guilan, Iran;

Colors significantly impact user experience (UX) and user interface (UI) in software applications and websites. Emotional states influence cognitive behavior during interactions. Leveraging colors based on physiological and psychological effects enhances usability. Efficient colors directly impact effectiveness, while satisfaction and pleasantness indirectly affect outcomes. Additionally, colors have the ability to capture the user's attention and simultaneously create an environment that elicits emotional responses. Through careful selection, the use of appropriate colors can optimize outcomes. Colors play a crucial role in establishing emotional connections with users. By combining shades that align with a brand's identity and evoke the desired emotional response, UX designers can create a pervasive and engaging user experience. For example, vibrant and dynamic colors may be used to instill a sense of energy and enthusiasm, fostering user engagement. A study was conducted, including participants, to investigate the expectations users have regarding the use of colors in applications and websites. The study revealed that users indeed have specific expectations when it comes to utilize different colors in design of websites and applications.

User expectation،Perception،Color wavelength،Design،User experience