#181F51#181F51

#181F51 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.7% C 0.091 H 272.6°. Best body text is #FFFFFF at 15.51:1 contrast (WCAG AA passes).

Color values

HEX	#181F51
RGB	rgb(24, 31, 81)
HSL	hsl(233, 54%, 21%)
HSV	hsv(233, 70%, 32%)
CMYK	cmyk(70.4%, 61.7%, 0%, 68.2%)
CIE-LAB	lab(14.22, 15.44, -31.67)
CIE-LCH	lch(14.22, 35.23, 295.99°)
OKLab	oklab(26.65% 0.0042 -0.0911)
OKLCH	oklch(26.65% 0.091 272.6)
XYZ	xyz(2.3514, 1.7680, 8.0003)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F51 #514A18

analogous

#183B51 #181F51 #2D1851

triadic

#181F51 #51181F #1F5118

tetradic

#181F51 #51183B #514A18 #18512D

square

#181F51 #51183B #514A18 #18512D

split-complementary

#181F51 #512D18 #3B5118

monochromatic

#070918 #0A0D22 #181F51 #263180 #3443AF

Accessibility & contrast

On white

15.51

#181F51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181F51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F51

15.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F51	#FFFFFF	#000000	##FFFFFF
##181F51	1.00	15.51	1.35	15.51
#FFFFFF	15.51	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002753

Deuteranopia (green-blind)

#002250

Tritanopia (blue-blind)

#002B34

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181f51;
/* rgb */ color: rgb(24, 31, 81);
/* oklch */ color: oklch(26.7% 0.091 272.6);

Tailwind

colors: {
  custom: {
    50: '#5d5a82',
    500: '#181f51',
    950: '#000000',
  },
}

SCSS

$custom: #181f51;
$custom-light: #5d5a82;
$custom-dark: #000000;

JSON

{
  "hex": "#181f51",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 81
  },
  "hsl": {
    "h": 232.632,
    "s": 54.286,
    "l": 20.588
  },
  "oklch": {
    "l": 0.26651,
    "c": 0.09114,
    "h": 272.6
  },
  "luminance": 0.01768
}

Semantic roles & 50–950 ramp

primary

#181F51

secondary

#887F3D

accent

#CC4ADE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #181F51

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

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