Color profile

#51C4EA — Color

RGB

81 · 196 · 234

HSL

194° · 78% · 61%

CMYK

65 · 16 · 0 · 8
#51C4EA

On light

WCAG AA

On dark

AAA headlines

Web safe variant

#66CCFF

Color spaces

RGB
R 81 G 196 B 234
HSL
194° 78% 61%
HSV
194° 65% 91%
CMYK
65 16 0 8
XYZ
37.98 47.17 84.93
CIE Lab
L 74.30 a -20.93 b -28.42

Base numbers

Base-2

Binary

Base-8

Octal

Base-10

Decimal

Base-16

Hex

RGB distribution

Red 15.85%
Green 38.36%
Blue 45.79%

Usage highlights

  • Versatile applications: perfect for dashboards, UI components and branding.
  • Color partnerships: pairs with #22c55e / #f97316 for modern contrast.
  • Display optimization: works well on both light and dark backgrounds.
  • Design confidence: signals trust, professionalism, and technical expertise.

Interactive tools

Build palettes and validate contrast on the fly

Drop favorite swatches into a custom stack, then test new text/background combos without leaving the page.

Contrast playground

Test two colors and instantly see ratio + WCAG level.

6.2:1 AA

Mission control confirms calm seas.

Body text ready (AA).

Derived palettes

Shades, tints and harmonies

Generate system-ready palettes directly from the source swatch. Each tone carries HEX and contextual tags.

Code snippets

Drop into CSS, Tailwind or design tokens

CSS utility

Component tokens

:root {
  --color-hex-51c4ea: #51C4EA;
}
.btn-color {
  background: var(--color-hex-51c4ea);
  color: #f8fafc;
  box-shadow: 0 10px 25px rgba(81, 196, 234, 0.25);
}
  • Sets CSS variable for reuse
  • Great for buttons + badges
Tailwind config

Design token extend

module.exports = {
  theme: {
    extend: {
      colors: {
        hex51c4ea: '#51C4EA',
        hex51c4eaTint: '#6ECDED',
      },
    },
  },
};
  • Adds custom palette entries
  • Works with Tailwind 3+
CSS effects

Shadow presets

.text-color-51c4ea {
  color: #51C4EA;
  text-shadow: 4px 4px 2px rgba(81, 196, 234, 0.8);
}
.panel-color-51c4ea {
  border: 3px solid #51C4EA;
  box-shadow: 1px 1px 3px 2px #51C4EA;
}
  • Typography + panel styling
  • Ideal for hero headlines

Accessibility lab

See the swatch on contrasting surfaces

Compare how #51C4EA behaves in light dashboards, dark terminals and mixed layouts. Ratios are based on WCAG 2.1 calculations at 100% opacity.

Light UI 6.2:1 · AA

Mission control confirms calm seas.

  • Usage: body copy, data labels.
  • Background: #e6eaeb shell.
  • Min size: 16px regular, 14px bold.
Dark UI 12.8:1 · AAA

Vector shields aligned. Engage warp.

  • Usage: hero headings, CTA outlines.
  • Background: #0f172a cockpit.
  • Min size: 12px icons, 18px type.

Pairing matrix

Background #51C4EA text #f8fafc text
#e6eaeb AA N/A
#0f172a AAA AA
#050505 AAA AA

Swap to #f97316 text on dark shells to push CTA contrast to 9.4:1.

Recommended supporting neutrals:

#e6eaeb · Shell #9bacb1 · Divider #0f172a · Cockpit #f97316 · Alert