#00658F Hex Color

#00658f provides about 6.4:1 contrast with white text at its standard hex value, which meets WCAG AA for normal text and supports readable buttons, navigation bars, and other dark interface surfaces.

#00658f reads as a cool blue because its deep blue base carries a subtle teal cast, giving it a calm, serious, and dependable mood that fits finance, security, healthcare, government, and nautical interfaces.

Pair #00658f with white or charcoal for restrained contrast, or use pale blue and muted teal accents for a cohesive cool palette. Warm terracotta or amber can add energy without overpowering the dark blue base.