#181B5D#181B5D

#181B5D is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.115 H 273.7°. Best body text is #FFFFFF at 15.51:1 contrast (WCAG AA passes).

Color values

HEX	#181B5D
RGB	rgb(24, 27, 93)
HSL	hsl(237, 59%, 23%)
HSV	hsv(237, 74%, 36%)
CMYK	cmyk(74.2%, 71%, 0%, 63.5%)
CIE-LAB	lab(14.22, 23.12, -39.76)
CIE-LCH	lch(14.22, 45.99, 300.18°)
OKLab	oklab(27% 0.0073 -0.1148)
OKLCH	oklch(27% 0.115 273.7)
XYZ	xyz(2.7437, 1.7681, 10.5505)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B5D #5D5A18

analogous

#183D5D #181B5D #37185D

triadic

#181B5D #5D181B #1B5D18

tetradic

#181B5D #5D183D #5D5A18 #185D37

square

#181B5D #5D183D #5D5A18 #185D37

split-complementary

#181B5D #5D3718 #3D5D18

monochromatic

#060718 #0B0D2C #181B5D #25298E #3137BE

Accessibility & contrast

On white

15.51

#181B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B5D

15.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B5D	#FFFFFF	#000000	##FFFFFF
##181B5D	1.00	15.51	1.35	15.51
#FFFFFF	15.51	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275F

Deuteranopia (green-blind)

#00215C

Tritanopia (blue-blind)

#002C39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181b5d;
/* rgb */ color: rgb(24, 27, 93);
/* oklch */ color: oklch(27.0% 0.115 273.7);

Tailwind

colors: {
  custom: {
    50: '#60578c',
    500: '#181b5d',
    950: '#000000',
  },
}

SCSS

$custom: #181b5d;
$custom-light: #60578c;
$custom-dark: #000000;

JSON

{
  "hex": "#181b5d",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 93
  },
  "hsl": {
    "h": 237.391,
    "s": 58.974,
    "l": 22.941
  },
  "oklch": {
    "l": 0.27,
    "c": 0.11507,
    "h": 273.7
  },
  "luminance": 0.01768
}

Semantic roles & 50–950 ramp

primary

#181B5D

secondary

#93903D

accent

#DB46E2

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181B5D

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

Preview Lab → · Contrast checker → · Palette generator →