#181A58#181A58

#181A58 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.3% C 0.109 H 274.6°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#181A58
RGB	rgb(24, 26, 88)
HSL	hsl(238, 57%, 22%)
HSV	hsv(238, 73%, 35%)
CMYK	cmyk(72.7%, 70.5%, 0%, 65.5%)
CIE-LAB	lab(13.46, 21.87, -37.65)
CIE-LCH	lch(13.46, 43.55, 300.15°)
OKLab	oklab(26.29% 0.0087 -0.1087)
OKLCH	oklch(26.29% 0.109 274.6)
XYZ	xyz(2.5070, 1.6373, 9.4145)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A58 #585618

analogous

#183A58 #181A58 #361858

triadic

#181A58 #58181A #1A5818

tetradic

#181A58 #58183A #585618 #185836

square

#181A58 #58183A #585618 #185836

split-complementary

#181A58 #583618 #3A5818

monochromatic

#070718 #0B0C28 #181A58 #252888 #3236B8

Accessibility & contrast

On white

15.82

#181A58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181A58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A58

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A58	#FFFFFF	#000000	##FFFFFF
##181A58	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255A

Deuteranopia (green-blind)

#002057

Tritanopia (blue-blind)

#002A36

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181a58;
/* rgb */ color: rgb(24, 26, 88);
/* oklch */ color: oklch(26.3% 0.109 274.6);

Tailwind

colors: {
  custom: {
    50: '#5f5688',
    500: '#181a58',
    950: '#000000',
  },
}

SCSS

$custom: #181a58;
$custom-light: #5f5688;
$custom-dark: #000000;

JSON

{
  "hex": "#181a58",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 88
  },
  "hsl": {
    "h": 238.125,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26289,
    "c": 0.10902,
    "h": 274.6
  },
  "luminance": 0.01638
}

Semantic roles & 50–950 ramp

primary

#181A58

secondary

#8F8C3D

accent

#DC47E0

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181A58

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

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