#181F56#181F56

#181F56 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.1% C 0.099 H 272.4°. Best body text is #FFFFFF at 15.34:1 contrast (WCAG AA passes).

Color values

HEX	#181F56
RGB	rgb(24, 31, 86)
HSL	hsl(233, 56%, 22%)
HSV	hsv(233, 72%, 34%)
CMYK	cmyk(72.1%, 64%, 0%, 66.3%)
CIE-LAB	lab(14.66, 17.46, -34.34)
CIE-LCH	lch(14.66, 38.53, 296.95°)
OKLab	oklab(27.11% 0.0042 -0.0989)
OKLCH	oklch(27.11% 0.099 272.4)
XYZ	xyz(2.5458, 1.8458, 9.0244)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F56 #564F18

analogous

#183E56 #181F56 #301856

triadic

#181F56 #56181F #1F5618

tetradic

#181F56 #56183E #564F18 #185630

square

#181F56 #56183E #564F18 #185630

split-complementary

#181F56 #563018 #3E5618

monochromatic

#070918 #0B0E26 #181F56 #253086 #3341B6

Accessibility & contrast

On white

15.34

#181F56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181F56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F56

15.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F56	#FFFFFF	#000000	##FFFFFF
##181F56	1.00	15.34	1.37	15.34
#FFFFFF	15.34	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002858

Deuteranopia (green-blind)

#002255

Tritanopia (blue-blind)

#002D37

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181f56;
/* rgb */ color: rgb(24, 31, 86);
/* oklch */ color: oklch(27.1% 0.099 272.4);

Tailwind

colors: {
  custom: {
    50: '#5e5a86',
    500: '#181f56',
    950: '#000000',
  },
}

SCSS

$custom: #181f56;
$custom-light: #5e5a86;
$custom-dark: #000000;

JSON

{
  "hex": "#181f56",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 86
  },
  "hsl": {
    "h": 233.226,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.27114,
    "c": 0.09901,
    "h": 272.4
  },
  "luminance": 0.01846
}

Semantic roles & 50–950 ramp

primary

#181F56

secondary

#8D843D

accent

#CF48E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F56

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

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