#123C42 Hex Color
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#123c42 is a dark cyan with low saturation and low lightness, so it reads smoky and serious rather than bright or cheerful. That dim, ashy quality suits dark mode interfaces, moody backgrounds, and tech branding. Treat it as a dominant base color rather than an accent. White text sits comfortably on top at roughly 12:1 contrast, well past WCAG AA. If it feels too flat, what colors make black shows how near-black hues like this one gain depth.
Questions about #123c42
What is #123c42 in RGB, HSL and CMYK?
In RGB, #123c42 is rgb(18, 60, 66), in HSL hsl(188, 57%, 16%) and in CMYK 73%, 9%, 0%, 74%.
What colors pair well with #123c42?
Warm accents like terracotta, amber, and dusty coral bring out the best in #123c42, since its cool, ashy undertone needs contrast in temperature to feel alive. Muted golds also work when you want a calmer palette.
Is #123c42 readable on white or black?
#123c42 has a 11.99:1 contrast ratio on white and 1.75:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works for body text and on black it is too faint for text. Try other pairs in the contrast checker.