#181F42#181F42

#181F42 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.4% C 0.066 H 272.4°. Best body text is #FFFFFF at 15.99:1 contrast (WCAG AA passes).

Color values

HEX	#181F42
RGB	rgb(24, 31, 66)
HSL	hsl(230, 47%, 18%)
HSV	hsv(230, 64%, 26%)
CMYK	cmyk(63.6%, 53%, 0%, 74.1%)
CIE-LAB	lab(13.03, 9.36, -23.24)
CIE-LCH	lch(13.03, 25.05, 291.94°)
OKLab	oklab(25.38% 0.0027 -0.0663)
OKLCH	oklch(25.38% 0.066 272.4)
XYZ	xyz(1.8497, 1.5674, 5.3583)
Luminance	0.0157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F42 #423B18

analogous

#183442 #181F42 #261842

triadic

#181F42 #42181F #1F4218

tetradic

#181F42 #421834 #423B18 #184226

square

#181F42 #421834 #423B18 #184226

split-complementary

#181F42 #422618 #344218

monochromatic

#080B16 #080B16 #181F42 #28346F #39499C

Accessibility & contrast

On white

15.99

#181F42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181F42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F42

15.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F42	#FFFFFF	#000000	##FFFFFF
##181F42	1.00	15.99	1.31	15.99
#FFFFFF	15.99	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	15.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F2443

Deuteranopia (green-blind)

#092041

Tritanopia (blue-blind)

#02272D

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181f42;
/* rgb */ color: rgb(24, 31, 66);
/* oklch */ color: oklch(25.4% 0.066 272.4);

Tailwind

colors: {
  custom: {
    50: '#595a76',
    500: '#181f42',
    950: '#000000',
  },
}

SCSS

$custom: #181f42;
$custom-light: #595a76;
$custom-dark: #000000;

JSON

{
  "hex": "#181f42",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 66
  },
  "hsl": {
    "h": 230,
    "s": 46.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.25376,
    "c": 0.06632,
    "h": 272.4
  },
  "luminance": 0.01568
}

Semantic roles & 50–950 ramp

primary

#181F42

secondary

#796F3D

accent

#C051D6

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181F42

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

Preview Lab → · Contrast checker → · Palette generator →