#1B4688#1B4688

#1B4688 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.3% C 0.120 H 259.0°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B4688
RGB	rgb(27, 70, 136)
HSL	hsl(216, 67%, 32%)
HSV	hsv(216, 80%, 53%)
CMYK	cmyk(80.1%, 48.5%, 0%, 46.7%)
CIE-LAB	lab(30.38, 10.53, -41.10)
CIE-LCH	lch(30.38, 42.43, 284.37°)
OKLab	oklab(40.31% -0.023 -0.118)
OKLCH	oklch(40.31% 0.12 259)
XYZ	xyz(7.0845, 6.3901, 24.1478)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4688 #885D1B

analogous

#1B7D88 #1B4688 #261B88

triadic

#1B4688 #881B46 #46881B

tetradic

#1B4688 #881B7D #885D1B #1B8826

square

#1B4688 #881B7D #885D1B #1B8826

split-complementary

#1B4688 #88261B #7D881B

monochromatic

#071122 #112C55 #1B4688 #2560BB #447FDA

Accessibility & contrast

On white

9.22

#1B4688 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B4688 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4688

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4688	#FFFFFF	#000000	##FFFFFF
##1B4688	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224D8A

Deuteranopia (green-blind)

#024387

Tritanopia (blue-blind)

#005660

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4688;
/* rgb */ color: rgb(27, 70, 136);
/* oklch */ color: oklch(40.3% 0.120 259.0);

Tailwind

colors: {
  custom: {
    50: '#6978ab',
    500: '#1b4688',
    950: '#000000',
  },
}

SCSS

$custom: #1b4688;
$custom-light: #6978ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4688",
  "rgb": {
    "r": 27,
    "g": 70,
    "b": 136
  },
  "hsl": {
    "h": 216.33,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.40306,
    "c": 0.12025,
    "h": 259
  },
  "luminance": 0.06391
}

Semantic roles & 50–950 ramp

primary

#1B4688

secondary

#BB8C44

accent

#A63EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1B4688

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

Preview Lab → · Contrast checker → · Palette generator →