#42D4F4 Hex Color
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This luminous cyan carries a high-energy, sparkling quality that feels fresh and youthful. Because of its intense saturation, #42d4f4 works best as an accent color to highlight UI elements rather than as a large background area. It pairs beautifully with deep charcoal grays to ground its electric vibe, though knowing how to make gray helps maintain balance in your palette. The hex code for this cyan is #42d4f4.
Questions about #42d4f4
What is #42d4f4 in RGB, HSL and CMYK?
In RGB, #42d4f4 is rgb(66, 212, 244), in HSL hsl(191, 89%, 61%) and in CMYK 73%, 13%, 0%, 4%.
How should I use #42d4f4 in interface design?
Use #42d4f4 as a punchy accent color for buttons or call-to-action elements rather than a background. Its high saturation works best against charcoal or deep neutral backgrounds that allow the electric tone to pop without overwhelming the user.
Is #42d4f4 considered a warm or cool color?
This cyan is decidedly cool, leaning heavily into icy, aquatic tones that evoke cleanliness and technology. Because of its blue-green balance, it creates a fresh, youthful mood that feels particularly effective for modern, digital-first branding and minimalist applications.
Is #42d4f4 readable on white or black?
#42d4f4 has a 1.75:1 contrast ratio on white and 11.95:1 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.