#181F5E#181F5E

#181F5E is a dark, moderate blue. Relative luminance 0.020; OKLCH L 27.9% C 0.111 H 272.1°. Best body text is #FFFFFF at 15.04:1 contrast (WCAG AA passes).

Color values

HEX	#181F5E
RGB	rgb(24, 31, 94)
HSL	hsl(234, 59%, 23%)
HSV	hsv(234, 74%, 37%)
CMYK	cmyk(74.5%, 67%, 0%, 63.1%)
CIE-LAB	lab(15.39, 20.68, -38.51)
CIE-LCH	lch(15.39, 43.71, 298.24°)
OKLab	oklab(27.89% 0.004 -0.1111)
OKLCH	oklch(27.89% 0.111 272.1)
XYZ	xyz(2.8864, 1.9820, 10.8180)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F5E #5E5718

analogous

#18425E #181F5E #34185E

triadic

#181F5E #5E181F #1F5E18

tetradic

#181F5E #5E1842 #5E5718 #185E34

square

#181F5E #5E1842 #5E5718 #185E34

split-complementary

#181F5E #5E3418 #425E18

monochromatic

#060818 #0C0F2D #181F5E #242F8F #313FC0

Accessibility & contrast

On white

15.04

#181F5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#181F5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F5E

15.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F5E	#FFFFFF	#000000	##FFFFFF
##181F5E	1.00	15.04	1.40	15.04
#FFFFFF	15.04	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A60

Deuteranopia (green-blind)

#00235D

Tritanopia (blue-blind)

#002F3B

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181f5e;
/* rgb */ color: rgb(24, 31, 94);
/* oklch */ color: oklch(27.9% 0.111 272.1);

Tailwind

colors: {
  custom: {
    50: '#605a8c',
    500: '#181f5e',
    950: '#000000',
  },
}

SCSS

$custom: #181f5e;
$custom-light: #605a8c;
$custom-dark: #000000;

JSON

{
  "hex": "#181f5e",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 94
  },
  "hsl": {
    "h": 234,
    "s": 59.322,
    "l": 23.137
  },
  "oklch": {
    "l": 0.27888,
    "c": 0.11121,
    "h": 272.1
  },
  "luminance": 0.01982
}

Semantic roles & 50–950 ramp

primary

#181F5E

secondary

#948C3D

accent

#D345E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181F5E

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

Preview Lab → · Contrast checker → · Palette generator →