#66A6D1 Hex Color
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A muted, cool blue with gray undertones, #66a6d1 feels steady and dependable rather than bright or playful. It suits security, healthcare, finance, and technology interfaces as a supporting tone beside navy or charcoal. Black text reads clearly on this shade, making it practical for readable UI panels. The hex code is #66a6d1.
Questions about #66a6d1
What is #66a6d1 in RGB, HSL and CMYK?
In RGB, #66a6d1 is rgb(102, 166, 209), in HSL hsl(204, 54%, 61%) and in CMYK 51%, 21%, 0%, 18%.
What colors pair well with #66a6d1?
Pair #66a6d1 with navy for grounded interfaces, then use terracotta sparingly as a restrained accent to add warmth without making the palette feel overly bright or losing its dependable character.
Does #66a6d1 read as a warm or cool color?
#66a6d1 reads as a cool, muted blue because its blue base is softened by gray undertones; it communicates steadiness and clarity more than energy, making it suitable for calm product screens, healthcare layouts, and dependable technology branding.
Is #66a6d1 readable on white or black?
#66a6d1 has a 2.64:1 contrast ratio on white and 7.94:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it is too faint for text and on black it works for body text. Try other pairs in the contrast checker.