#181B75#181B75

#181B75 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.6% C 0.148 H 271.5°. Best body text is #FFFFFF at 14.46:1 contrast (WCAG AA passes).

Color values

HEX	#181B75
RGB	rgb(24, 27, 117)
HSL	hsl(238, 66%, 28%)
HSV	hsv(238, 79%, 46%)
CMYK	cmyk(79.5%, 76.9%, 0%, 54.1%)
CIE-LAB	lab(16.81, 32.20, -51.24)
CIE-LCH	lch(16.81, 60.52, 302.14°)
OKLab	oklab(29.64% 0.0038 -0.1483)
OKLCH	oklch(29.64% 0.148 271.5)
XYZ	xyz(3.9784, 2.2620, 17.0531)
Luminance	0.0226 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B75 #757218

analogous

#184975 #181B75 #441875

triadic

#181B75 #75181B #1B7518

tetradic

#181B75 #751849 #757218 #187544

square

#181B75 #751849 #757218 #187544

split-complementary

#181B75 #754418 #497518

monochromatic

#050619 #0E0F42 #181B75 #2227A8 #3238D5

Accessibility & contrast

On white

14.46

#181B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#181B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B75

14.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B75	#FFFFFF	#000000	##FFFFFF
##181B75	1.00	14.46	1.45	14.46
#FFFFFF	14.46	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E78

Deuteranopia (green-blind)

#002573

Tritanopia (blue-blind)

#003546

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #181b75;
/* rgb */ color: rgb(24, 27, 117);
/* oklch */ color: oklch(29.6% 0.148 271.5);

Tailwind

colors: {
  custom: {
    50: '#67589e',
    500: '#181b75',
    950: '#000000',
  },
}

SCSS

$custom: #181b75;
$custom-light: #67589e;
$custom-dark: #000000;

JSON

{
  "hex": "#181b75",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 117
  },
  "hsl": {
    "h": 238.065,
    "s": 65.957,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29639,
    "c": 0.1484,
    "h": 271.5
  },
  "luminance": 0.02262
}

Semantic roles & 50–950 ramp

primary

#181B75

secondary

#AAA73F

accent

#E33FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #181B75

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

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