#181F52#181F52

#181F52 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.7% C 0.093 H 272.6°. Best body text is #FFFFFF at 15.48:1 contrast (WCAG AA passes).

Color values

HEX	#181F52
RGB	rgb(24, 31, 82)
HSL	hsl(233, 55%, 21%)
HSV	hsv(233, 71%, 32%)
CMYK	cmyk(70.7%, 62.2%, 0%, 67.8%)
CIE-LAB	lab(14.31, 15.84, -32.21)
CIE-LCH	lch(14.31, 35.89, 296.19°)
OKLab	oklab(26.74% 0.0042 -0.0926)
OKLCH	oklch(26.74% 0.093 272.6)
XYZ	xyz(2.3892, 1.7831, 8.1993)
Luminance	0.0178 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F52 #524B18

analogous

#183C52 #181F52 #2E1852

triadic

#181F52 #52181F #1F5218

tetradic

#181F52 #52183C #524B18 #18522E

square

#181F52 #52183C #524B18 #18522E

split-complementary

#181F52 #522E18 #3C5218

monochromatic

#070918 #0A0D23 #181F52 #263181 #3443B1

Accessibility & contrast

On white

15.48

#181F52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181F52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F52

15.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F52	#FFFFFF	#000000	##FFFFFF
##181F52	1.00	15.48	1.36	15.48
#FFFFFF	15.48	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002754

Deuteranopia (green-blind)

#002251

Tritanopia (blue-blind)

#002B35

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181f52;
/* rgb */ color: rgb(24, 31, 82);
/* oklch */ color: oklch(26.7% 0.093 272.6);

Tailwind

colors: {
  custom: {
    50: '#5d5a83',
    500: '#181f52',
    950: '#000000',
  },
}

SCSS

$custom: #181f52;
$custom-light: #5d5a83;
$custom-dark: #000000;

JSON

{
  "hex": "#181f52",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 82
  },
  "hsl": {
    "h": 232.759,
    "s": 54.717,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26743,
    "c": 0.09273,
    "h": 272.6
  },
  "luminance": 0.01783
}

Semantic roles & 50–950 ramp

primary

#181F52

secondary

#89803D

accent

#CC4ADE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F52

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

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