#1B4389#1B4389

#1B4389 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.7% C 0.126 H 260.7°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B4389
RGB	rgb(27, 67, 137)
HSL	hsl(218, 67%, 32%)
HSV	hsv(218, 80%, 54%)
CMYK	cmyk(80.3%, 51.1%, 0%, 46.3%)
CIE-LAB	lab(29.55, 13.00, -43.06)
CIE-LCH	lch(29.55, 44.98, 286.80°)
OKLab	oklab(39.69% -0.0203 -0.1239)
OKLCH	oklch(39.69% 0.126 260.7)
XYZ	xyz(6.9729, 6.0527, 24.4628)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4389 #89611B

analogous

#1B7A89 #1B4389 #2A1B89

triadic

#1B4389 #891B43 #43891B

tetradic

#1B4389 #891B7A #89611B #1B892A

square

#1B4389 #891B7A #89611B #1B892A

split-complementary

#1B4389 #892A1B #7A891B

monochromatic

#071123 #112A56 #1B4389 #255CBC #447BDA

Accessibility & contrast

On white

9.50

#1B4389 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B4389 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4389

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4389	#FFFFFF	#000000	##FFFFFF
##1B4389	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194B8C

Deuteranopia (green-blind)

#004188

Tritanopia (blue-blind)

#00545F

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b4389;
/* rgb */ color: rgb(27, 67, 137);
/* oklch */ color: oklch(39.7% 0.126 260.7);

Tailwind

colors: {
  custom: {
    50: '#6a76ac',
    500: '#1b4389',
    950: '#000000',
  },
}

SCSS

$custom: #1b4389;
$custom-light: #6a76ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4389",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 137
  },
  "hsl": {
    "h": 218.182,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.3969,
    "c": 0.12551,
    "h": 260.7
  },
  "luminance": 0.06053
}

Semantic roles & 50–950 ramp

primary

#1B4389

secondary

#BC9044

accent

#AB3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4389

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

Preview Lab → · Contrast checker → · Palette generator →