#181B5E#181B5E

#181B5E is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.1% C 0.117 H 273.6°. Best body text is #FFFFFF at 15.47:1 contrast (WCAG AA passes).

Color values

HEX	#181B5E
RGB	rgb(24, 27, 94)
HSL	hsl(237, 59%, 23%)
HSV	hsv(237, 74%, 37%)
CMYK	cmyk(74.5%, 71.3%, 0%, 63.1%)
CIE-LAB	lab(14.32, 23.51, -40.26)
CIE-LCH	lch(14.32, 46.62, 300.29°)
OKLab	oklab(27.1% 0.0072 -0.1163)
OKLCH	oklch(27.1% 0.117 273.6)
XYZ	xyz(2.7883, 1.7859, 10.7853)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B5E #5E5B18

analogous

#183E5E #181B5E #38185E

triadic

#181B5E #5E181B #1B5E18

tetradic

#181B5E #5E183E #5E5B18 #185E38

square

#181B5E #5E183E #5E5B18 #185E38

split-complementary

#181B5E #5E3818 #3E5E18

monochromatic

#060718 #0C0D2D #181B5E #24298F #3137C0

Accessibility & contrast

On white

15.47

#181B5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181B5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B5E

15.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B5E	#FFFFFF	#000000	##FFFFFF
##181B5E	1.00	15.47	1.36	15.47
#FFFFFF	15.47	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002860

Deuteranopia (green-blind)

#00215D

Tritanopia (blue-blind)

#002D3A

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181b5e;
/* rgb */ color: rgb(24, 27, 94);
/* oklch */ color: oklch(27.1% 0.117 273.6);

Tailwind

colors: {
  custom: {
    50: '#60578c',
    500: '#181b5e',
    950: '#000000',
  },
}

SCSS

$custom: #181b5e;
$custom-light: #60578c;
$custom-dark: #000000;

JSON

{
  "hex": "#181b5e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 94
  },
  "hsl": {
    "h": 237.429,
    "s": 59.322,
    "l": 23.137
  },
  "oklch": {
    "l": 0.27104,
    "c": 0.11653,
    "h": 273.6
  },
  "luminance": 0.01786
}

Semantic roles & 50–950 ramp

primary

#181B5E

secondary

#94913D

accent

#DC45E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181B5E

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

Preview Lab → · Contrast checker → · Palette generator →