#181F43#181F43

#181F43 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.5% C 0.068 H 272.4°. Best body text is #FFFFFF at 15.96:1 contrast (WCAG AA passes).

Color values

HEX	#181F43
RGB	rgb(24, 31, 67)
HSL	hsl(230, 47%, 18%)
HSV	hsv(230, 64%, 26%)
CMYK	cmyk(64.2%, 53.7%, 0%, 73.7%)
CIE-LAB	lab(13.10, 9.76, -23.82)
CIE-LCH	lch(13.10, 25.74, 292.29°)
OKLab	oklab(25.46% 0.0029 -0.068)
OKLCH	oklch(25.46% 0.068 272.4)
XYZ	xyz(1.8795, 1.5793, 5.5149)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F43 #433C18

analogous

#183443 #181F43 #261843

triadic

#181F43 #43181F #1F4318

tetradic

#181F43 #431834 #433C18 #184326

square

#181F43 #431834 #433C18 #184326

split-complementary

#181F43 #432618 #344318

monochromatic

#080A17 #080A17 #181F43 #283470 #38499D

Accessibility & contrast

On white

15.96

#181F43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181F43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F43

15.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F43	#FFFFFF	#000000	##FFFFFF
##181F43	1.00	15.96	1.32	15.96
#FFFFFF	15.96	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E2444

Deuteranopia (green-blind)

#082042

Tritanopia (blue-blind)

#01272D

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181f43;
/* rgb */ color: rgb(24, 31, 67);
/* oklch */ color: oklch(25.5% 0.068 272.4);

Tailwind

colors: {
  custom: {
    50: '#595a77',
    500: '#181f43',
    950: '#000000',
  },
}

SCSS

$custom: #181f43;
$custom-light: #595a77;
$custom-dark: #000000;

JSON

{
  "hex": "#181f43",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 67
  },
  "hsl": {
    "h": 230.233,
    "s": 47.253,
    "l": 17.843
  },
  "oklch": {
    "l": 0.25455,
    "c": 0.06803,
    "h": 272.4
  },
  "luminance": 0.01579
}

Semantic roles & 50–950 ramp

primary

#181F43

secondary

#7A703D

accent

#C151D7

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181F43

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

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