#1B4789#1B4789

#1B4789 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 40.6% C 0.120 H 258.7°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B4789
RGB	rgb(27, 71, 137)
HSL	hsl(216, 67%, 32%)
HSV	hsv(216, 80%, 54%)
CMYK	cmyk(80.3%, 48.2%, 0%, 46.3%)
CIE-LAB	lab(30.75, 10.25, -41.12)
CIE-LCH	lch(30.75, 42.38, 283.99°)
OKLab	oklab(40.61% -0.0236 -0.1181)
OKLCH	oklch(40.61% 0.12 258.7)
XYZ	xyz(7.2189, 6.5448, 24.5449)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4789 #895D1B

analogous

#1B7E89 #1B4789 #261B89

triadic

#1B4789 #891B47 #47891B

tetradic

#1B4789 #891B7E #895D1B #1B8926

square

#1B4789 #891B7E #895D1B #1B8926

split-complementary

#1B4789 #89261B #7E891B

monochromatic

#071223 #112D56 #1B4789 #2561BC #4480DA

Accessibility & contrast

On white

9.09

#1B4789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1B4789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4789

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4789	#FFFFFF	#000000	##FFFFFF
##1B4789	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234E8B

Deuteranopia (green-blind)

#044488

Tritanopia (blue-blind)

#005761

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4789;
/* rgb */ color: rgb(27, 71, 137);
/* oklch */ color: oklch(40.6% 0.120 258.7);

Tailwind

colors: {
  custom: {
    50: '#6979ac',
    500: '#1b4789',
    950: '#000000',
  },
}

SCSS

$custom: #1b4789;
$custom-light: #6979ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4789",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 137
  },
  "hsl": {
    "h": 216,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.40613,
    "c": 0.12041,
    "h": 258.7
  },
  "luminance": 0.06546
}

Semantic roles & 50–950 ramp

primary

#1B4789

secondary

#BC8C44

accent

#A53EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1B4789

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

Preview Lab → · Contrast checker → · Palette generator →