#181F5F#181F5F

#181F5F is a dark, moderate blue. Relative luminance 0.020; OKLCH L 28.0% C 0.113 H 272.0°. Best body text is #FFFFFF at 15.00:1 contrast (WCAG AA passes).

Color values

HEX	#181F5F
RGB	rgb(24, 31, 95)
HSL	hsl(234, 60%, 23%)
HSV	hsv(234, 75%, 37%)
CMYK	cmyk(74.7%, 67.4%, 0%, 62.7%)
CIE-LAB	lab(15.49, 21.08, -39.02)
CIE-LCH	lch(15.49, 44.35, 298.38°)
OKLab	oklab(27.99% 0.004 -0.1126)
OKLCH	oklch(27.99% 0.113 272)
XYZ	xyz(2.9315, 2.0001, 11.0558)
Luminance	0.0200 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F5F #5F5818

analogous

#18425F #181F5F #34185F

triadic

#181F5F #5F181F #1F5F18

tetradic

#181F5F #5F1842 #5F5818 #185F34

square

#181F5F #5F1842 #5F5818 #185F34

split-complementary

#181F5F #5F3418 #425F18

monochromatic

#060818 #0C0F2E #181F5F #242F90 #313FC1

Accessibility & contrast

On white

15.00

#181F5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#181F5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F5F

15.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F5F	#FFFFFF	#000000	##FFFFFF
##181F5F	1.00	15.00	1.40	15.00
#FFFFFF	15.00	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A61

Deuteranopia (green-blind)

#00235E

Tritanopia (blue-blind)

#002F3B

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #181f5f;
/* rgb */ color: rgb(24, 31, 95);
/* oklch */ color: oklch(28.0% 0.113 272.0);

Tailwind

colors: {
  custom: {
    50: '#605a8d',
    500: '#181f5f',
    950: '#000000',
  },
}

SCSS

$custom: #181f5f;
$custom-light: #605a8d;
$custom-dark: #000000;

JSON

{
  "hex": "#181f5f",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 95
  },
  "hsl": {
    "h": 234.085,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.27987,
    "c": 0.11271,
    "h": 272
  },
  "luminance": 0.02
}

Semantic roles & 50–950 ramp

primary

#181F5F

secondary

#958D3D

accent

#D345E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040C

muted

#7A797D

Preview Lab

Preview with #181F5F

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

Preview Lab → · Contrast checker → · Palette generator →