#181F79#181F79

#181F79 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.7% C 0.149 H 270.5°. Best body text is #FFFFFF at 13.90:1 contrast (WCAG AA passes).

Color values

HEX	#181F79
RGB	rgb(24, 31, 121)
HSL	hsl(236, 67%, 28%)
HSV	hsv(236, 80%, 47%)
CMYK	cmyk(80.2%, 74.4%, 0%, 52.5%)
CIE-LAB	lab(18.16, 31.14, -51.57)
CIE-LCH	lch(18.16, 60.25, 301.12°)
OKLab	oklab(30.74% 0.0013 -0.1493)
OKLCH	oklch(30.74% 0.149 270.5)
XYZ	xyz(4.3167, 2.5542, 18.3510)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F79 #797218

analogous

#184F79 #181F79 #411879

triadic

#181F79 #79181F #1F7918

tetradic

#181F79 #79184F #797218 #187941

square

#181F79 #79184F #797218 #187941

split-complementary

#181F79 #794118 #4F7918

monochromatic

#05071A #0E1246 #181F79 #222CAC #3540D7

Accessibility & contrast

On white

13.90

#181F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#181F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F79

13.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F79	#FFFFFF	#000000	##FFFFFF
##181F79	1.00	13.90	1.51	13.90
#FFFFFF	13.90	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317C

Deuteranopia (green-blind)

#002877

Tritanopia (blue-blind)

#00394A

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #181f79;
/* rgb */ color: rgb(24, 31, 121);
/* oklch */ color: oklch(30.7% 0.149 270.5);

Tailwind

colors: {
  custom: {
    50: '#675ba1',
    500: '#181f79',
    950: '#000000',
  },
}

SCSS

$custom: #181f79;
$custom-light: #675ba1;
$custom-dark: #000000;

JSON

{
  "hex": "#181f79",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 121
  },
  "hsl": {
    "h": 235.67,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3074,
    "c": 0.14935,
    "h": 270.5
  },
  "luminance": 0.02555
}

Semantic roles & 50–950 ramp

primary

#181F79

secondary

#AEA63F

accent

#DD3EEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #181F79

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

Preview Lab → · Contrast checker → · Palette generator →