#213C5C Hex Color

White text on #213c5c reaches roughly an 11.3:1 contrast ratio, making the combination suitable for accessible body text, headings, and interface controls when font size and weight are also handled well.

#213c5c reads as a cool blue because its blue base is softened by gray, giving it a restrained, dusty appearance rather than a bright or warm look in most interfaces and brand palettes. That makes it a strong fit for serious, professional visual systems.

#213c5c pairs well with burgundy for a rich, formal palette, while white provides crisp contrast and pale blue-gray adds a quieter, coordinated option for layouts that need depth without much visual noise. Use lighter pairings for supporting panels, borders, or text so the dark blue remains the visual anchor.