#181D5D#181D5D

#181D5D is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.4% C 0.112 H 272.9°. Best body text is #FFFFFF at 15.30:1 contrast (WCAG AA passes).

Color values

HEX	#181D5D
RGB	rgb(24, 29, 93)
HSL	hsl(236, 59%, 23%)
HSV	hsv(236, 74%, 36%)
CMYK	cmyk(74.2%, 68.8%, 0%, 63.5%)
CIE-LAB	lab(14.75, 21.71, -38.89)
CIE-LCH	lch(14.75, 44.54, 299.18°)
OKLab	oklab(27.39% 0.0057 -0.1123)
OKLCH	oklch(27.39% 0.112 272.9)
XYZ	xyz(2.7912, 1.8630, 10.5663)
Luminance	0.0186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D5D #5D5818

analogous

#183F5D #181D5D #35185D

triadic

#181D5D #5D181D #1D5D18

tetradic

#181D5D #5D183F #5D5818 #185D35

square

#181D5D #5D183F #5D5818 #185D35

split-complementary

#181D5D #5D3518 #3F5D18

monochromatic

#060818 #0B0E2C #181D5D #252C8E #313BBE

Accessibility & contrast

On white

15.30

#181D5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181D5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D5D

15.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D5D	#FFFFFF	#000000	##FFFFFF
##181D5D	1.00	15.30	1.37	15.30
#FFFFFF	15.30	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285F

Deuteranopia (green-blind)

#00225C

Tritanopia (blue-blind)

#002E3A

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181d5d;
/* rgb */ color: rgb(24, 29, 93);
/* oklch */ color: oklch(27.4% 0.112 272.9);

Tailwind

colors: {
  custom: {
    50: '#60598c',
    500: '#181d5d',
    950: '#000000',
  },
}

SCSS

$custom: #181d5d;
$custom-light: #60598c;
$custom-dark: #000000;

JSON

{
  "hex": "#181d5d",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 93
  },
  "hsl": {
    "h": 235.652,
    "s": 58.974,
    "l": 22.941
  },
  "oklch": {
    "l": 0.27387,
    "c": 0.11243,
    "h": 272.9
  },
  "luminance": 0.01863
}

Semantic roles & 50–950 ramp

primary

#181D5D

secondary

#938D3D

accent

#D746E2

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181D5D

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

Preview Lab → · Contrast checker → · Palette generator →