Color profile

#00558C — Color

RGB

0 · 85 · 140

HSL

203° · 100% · 27%

CMYK

100 · 39 · 0 · 45
#00558C

On light

WCAG AA

On dark

AAA headlines

Web safe variant

#006699

Color spaces

RGB
R 0 G 85 B 140
HSL
203° 100% 27%
HSV
203° 100% 54%
CMYK
100 39 0 45
XYZ
7.98 8.39 26.00
CIE Lab
L 34.78 a 0.06 b -36.53

Base numbers

Base-2

Binary

Base-8

Octal

Base-10

Decimal

Base-16

Hex

RGB distribution

Red 0.00%
Green 37.78%
Blue 62.22%

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-00558c: #00558C;
}
.btn-color {
  background: var(--color-hex-00558c);
  color: #f8fafc;
  box-shadow: 0 10px 25px rgba(0, 85, 140, 0.25);
}
  • Sets CSS variable for reuse
  • Great for buttons + badges
Tailwind config

Design token extend

module.exports = {
  theme: {
    extend: {
      colors: {
        hex00558c: '#00558C',
        hex00558cTint: '#2A719F',
      },
    },
  },
};
  • Adds custom palette entries
  • Works with Tailwind 3+
CSS effects

Shadow presets

.text-color-00558c {
  color: #00558C;
  text-shadow: 4px 4px 2px rgba(0, 85, 140, 0.8);
}
.panel-color-00558c {
  border: 3px solid #00558C;
  box-shadow: 1px 1px 3px 2px #00558C;
}
  • Typography + panel styling
  • Ideal for hero headlines

Accessibility lab

See the swatch on contrasting surfaces

Compare how #00558C 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 #00558C 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