#181F5D#181F5D

#181F5D is a dark, moderate blue. Relative luminance 0.020; OKLCH L 27.8% C 0.110 H 272.1°. Best body text is #FFFFFF at 15.08:1 contrast (WCAG AA passes).

Color values

HEX	#181F5D
RGB	rgb(24, 31, 93)
HSL	hsl(234, 59%, 23%)
HSV	hsv(234, 74%, 36%)
CMYK	cmyk(74.2%, 66.7%, 0%, 63.5%)
CIE-LAB	lab(15.30, 20.28, -37.99)
CIE-LCH	lch(15.30, 43.07, 298.09°)
OKLab	oklab(27.79% 0.0041 -0.1096)
OKLCH	oklch(27.79% 0.11 272.1)
XYZ	xyz(2.8418, 1.9642, 10.5832)
Luminance	0.0196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F5D #5D5618

analogous

#18415D #181F5D #33185D

triadic

#181F5D #5D181F #1F5D18

tetradic

#181F5D #5D1841 #5D5618 #185D33

square

#181F5D #5D1841 #5D5618 #185D33

split-complementary

#181F5D #5D3318 #415D18

monochromatic

#060818 #0B0F2C #181F5D #252F8E #313FBE

Accessibility & contrast

On white

15.08

#181F5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181F5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F5D

15.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F5D	#FFFFFF	#000000	##FFFFFF
##181F5D	1.00	15.08	1.39	15.08
#FFFFFF	15.08	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A5F

Deuteranopia (green-blind)

#00235C

Tritanopia (blue-blind)

#002F3A

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181f5d;
/* rgb */ color: rgb(24, 31, 93);
/* oklch */ color: oklch(27.8% 0.110 272.1);

Tailwind

colors: {
  custom: {
    50: '#605a8c',
    500: '#181f5d',
    950: '#000000',
  },
}

SCSS

$custom: #181f5d;
$custom-light: #605a8c;
$custom-dark: #000000;

JSON

{
  "hex": "#181f5d",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 93
  },
  "hsl": {
    "h": 233.913,
    "s": 58.974,
    "l": 22.941
  },
  "oklch": {
    "l": 0.27789,
    "c": 0.10972,
    "h": 272.1
  },
  "luminance": 0.01964
}

Semantic roles & 50–950 ramp

primary

#181F5D

secondary

#938B3D

accent

#D246E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #181F5D

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

Preview Lab → · Contrast checker → · Palette generator →