#181B5F#181B5F

#181B5F is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.2% C 0.118 H 273.5°. Best body text is #FFFFFF at 15.43:1 contrast (WCAG AA passes).

Color values

HEX	#181B5F
RGB	rgb(24, 27, 95)
HSL	hsl(237, 60%, 23%)
HSV	hsv(237, 75%, 37%)
CMYK	cmyk(74.7%, 71.6%, 0%, 62.7%)
CIE-LAB	lab(14.42, 23.90, -40.76)
CIE-LCH	lch(14.42, 47.25, 300.39°)
OKLab	oklab(27.21% 0.0071 -0.1178)
OKLCH	oklch(27.21% 0.118 273.5)
XYZ	xyz(2.8335, 1.8040, 11.0231)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B5F #5F5C18

analogous

#183E5F #181B5F #38185F

triadic

#181B5F #5F181B #1B5F18

tetradic

#181B5F #5F183E #5F5C18 #185F38

square

#181B5F #5F183E #5F5C18 #185F38

split-complementary

#181B5F #5F3818 #3E5F18

monochromatic

#060718 #0C0D2E #181B5F #242990 #3137C1

Accessibility & contrast

On white

15.43

#181B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B5F

15.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B5F	#FFFFFF	#000000	##FFFFFF
##181B5F	1.00	15.43	1.36	15.43
#FFFFFF	15.43	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002861

Deuteranopia (green-blind)

#00215E

Tritanopia (blue-blind)

#002D3A

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181b5f;
/* rgb */ color: rgb(24, 27, 95);
/* oklch */ color: oklch(27.2% 0.118 273.5);

Tailwind

colors: {
  custom: {
    50: '#61578d',
    500: '#181b5f',
    950: '#000000',
  },
}

SCSS

$custom: #181b5f;
$custom-light: #61578d;
$custom-dark: #000000;

JSON

{
  "hex": "#181b5f",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 95
  },
  "hsl": {
    "h": 237.465,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.27209,
    "c": 0.11798,
    "h": 273.5
  },
  "luminance": 0.01804
}

Semantic roles & 50–950 ramp

primary

#181B5F

secondary

#95923D

accent

#DC45E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181B5F

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

Preview Lab → · Contrast checker → · Palette generator →