#66B5B3 Hex Color
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#66b5b3 is a dusty cyan, a pastel sky tone with gray folded in. That muted quality keeps it soft and cool instead of loud. It works best as a background color for spring themes, baby products, or calm tech interfaces, with black text passing comfortably at about 8.8:1 contrast. Warm accents like terracotta or coral stop it from reading flat.
Questions about #66b5b3
What is #66b5b3 in RGB, HSL and CMYK?
In RGB, #66b5b3 is rgb(102, 181, 179), in HSL hsl(178, 35%, 55%) and in CMYK 44%, 0%, 1%, 29%.
What colors pair well with #66b5b3?
Warm opposites work best: terracotta and coral bring out the cool side of #66b5b3, while deep navy anchors it in a fuller palette. Avoid pairing it with bright greens or blues, which compete with its muted tone.
Is #66b5b3 readable on white or black?
#66b5b3 has a 2.37:1 contrast ratio on white and 8.82:1 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.