RAL 5015 Sky Blue

RAL 5015 Sky Blue (#2271B3) is a vivid, medium-bright blue from the RAL Classic system named after the clear daytime sky — a clean, open blue without grey or green contamination. This clear sky blue is used in aviation and aerospace branding, children's room design, and product lines associated with openness, freedom, and crisp air.

True blue is the world's most popular favorite color, representing trust, competence, and stability. It suppresses appetite and promotes productivity, making it ideal for work environments. Blue is the dominant color in corporate branding because it communicates reliability without emotional excess.

Medium blue is the default choice for primary buttons, navigation bars, and link text across the web. It forms the foundation of design systems for banking, insurance, and enterprise SaaS products. While universally safe, it benefits from a distinctive hue angle or saturation to avoid blending into the sea of blue brands.