#1B4E5A#1B4E5A

#1B4E5A is a dark, muted cyan. Relative luminance 0.064; OKLCH L 39.5% C 0.057 H 216.1°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E5A
RGB	rgb(27, 78, 90)
HSL	hsl(191, 54%, 23%)
HSV	hsv(191, 70%, 35%)
CMYK	cmyk(70%, 13.3%, 0%, 64.7%)
CIE-LAB	lab(30.45, -12.59, -12.06)
CIE-LCH	lch(30.45, 17.43, 223.75°)
OKLab	oklab(39.54% -0.0459 -0.0335)
OKLCH	oklch(39.54% 0.057 216.1)
XYZ	xyz(5.0211, 6.4194, 10.6453)
Luminance	0.0642 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E5A #5A271B

analogous

#1B5A46 #1B4E5A #1B2E5A

triadic

#1B4E5A #5A1B4E #4E5A1B

tetradic

#1B4E5A #461B5A #5A271B #2E5A1B

square

#1B4E5A #461B5A #5A271B #2E5A1B

split-complementary

#1B4E5A #5A1B2E #5A461B

monochromatic

#071418 #0D252B #1B4E5A #297789 #37A0B8

Accessibility & contrast

On white

9.19

#1B4E5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B4E5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E5A

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E5A	#FFFFFF	#000000	##FFFFFF
##1B4E5A	1.00	9.19	2.28	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464B5B

Deuteranopia (green-blind)

#3D455A

Tritanopia (blue-blind)

#005252

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4e5a;
/* rgb */ color: rgb(27, 78, 90);
/* oklch */ color: oklch(39.5% 0.057 216.1);

Tailwind

colors: {
  custom: {
    50: '#607f88',
    500: '#1b4e5a',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e5a;
$custom-light: #607f88;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e5a",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 90
  },
  "hsl": {
    "h": 191.429,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.39541,
    "c": 0.05688,
    "h": 216.1
  },
  "luminance": 0.0642
}

Semantic roles & 50–950 ramp

primary

#1B4E5A

secondary

#905041

accent

#674BDD

background

#F5F7F8

surface

#EAEEEF

border

#C6C9CA

text

#050A0B

muted

#797C7C

Preview Lab

Preview with #1B4E5A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →