Design 101: Graphic design basics you need to know
The psychology of color in web design
Blue is associated with masculinity, competence, quality, calmness, dependability, steadfastness, wisdom, loyalty, strength, productivity, trust, and security. Bright blues can also be refreshing and energizing.
- When to use blue
Blue is often used by large corporations and banks because it’s non-invasive and associated with dependability. It’s good for health care, dental, high-tech, medical, science, government, legal, and utilities. - When to avoid blue
Using certain shades of blues (on the darker end of the spectrum), or using too much blue can make your website feel uncaring and cold. Blue may also curb appetite, so be careful using it with food-related content.
https://99designs.com/blog/creative-inspiration/psychology-color-web-design/