#1B4388#1B4388

#1B4388 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.6% C 0.124 H 260.5°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B4388
RGB	rgb(27, 67, 136)
HSL	hsl(218, 67%, 32%)
HSV	hsv(218, 80%, 53%)
CMYK	cmyk(80.1%, 50.7%, 0%, 46.7%)
CIE-LAB	lab(29.47, 12.59, -42.56)
CIE-LCH	lch(29.47, 44.38, 286.48°)
OKLab	oklab(39.61% -0.0204 -0.1224)
OKLCH	oklch(39.61% 0.124 260.5)
XYZ	xyz(6.9015, 6.0241, 24.0868)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4388 #88601B

analogous

#1B7A88 #1B4388 #2A1B88

triadic

#1B4388 #881B43 #43881B

tetradic

#1B4388 #881B7A #88601B #1B882A

square

#1B4388 #881B7A #88601B #1B882A

split-complementary

#1B4388 #882A1B #7A881B

monochromatic

#071122 #112A55 #1B4388 #255CBB #447BDA

Accessibility & contrast

On white

9.52

#1B4388 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B4388 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4388

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4388	#FFFFFF	#000000	##FFFFFF
##1B4388	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4B8B

Deuteranopia (green-blind)

#004187

Tritanopia (blue-blind)

#00545F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4388;
/* rgb */ color: rgb(27, 67, 136);
/* oklch */ color: oklch(39.6% 0.124 260.5);

Tailwind

colors: {
  custom: {
    50: '#6976ab',
    500: '#1b4388',
    950: '#000000',
  },
}

SCSS

$custom: #1b4388;
$custom-light: #6976ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4388",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 136
  },
  "hsl": {
    "h": 217.982,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.39612,
    "c": 0.12407,
    "h": 260.5
  },
  "luminance": 0.06025
}

Semantic roles & 50–950 ramp

primary

#1B4388

secondary

#BB8F44

accent

#AB3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4388

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

Preview Lab → · Contrast checker → · Palette generator →