#181F58#181F58

#181F58 is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.3% C 0.102 H 272.4°. Best body text is #FFFFFF at 15.26:1 contrast (WCAG AA passes).

Color values

HEX	#181F58
RGB	rgb(24, 31, 88)
HSL	hsl(233, 57%, 22%)
HSV	hsv(233, 73%, 35%)
CMYK	cmyk(72.7%, 64.8%, 0%, 65.5%)
CIE-LAB	lab(14.84, 18.27, -35.40)
CIE-LCH	lch(14.84, 39.83, 297.30°)
OKLab	oklab(27.3% 0.0042 -0.102)
OKLCH	oklch(27.3% 0.102 272.4)
XYZ	xyz(2.6275, 1.8785, 9.4547)
Luminance	0.0188 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F58 #585118

analogous

#183F58 #181F58 #311858

triadic

#181F58 #58181F #1F5818

tetradic

#181F58 #58183F #585118 #185831

square

#181F58 #58183F #585118 #185831

split-complementary

#181F58 #583118 #3F5818

monochromatic

#070818 #0B0E28 #181F58 #253088 #3241B8

Accessibility & contrast

On white

15.26

#181F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#181F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F58

15.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F58	#FFFFFF	#000000	##FFFFFF
##181F58	1.00	15.26	1.38	15.26
#FFFFFF	15.26	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285A

Deuteranopia (green-blind)

#002357

Tritanopia (blue-blind)

#002D38

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181f58;
/* rgb */ color: rgb(24, 31, 88);
/* oklch */ color: oklch(27.3% 0.102 272.4);

Tailwind

colors: {
  custom: {
    50: '#5e5a88',
    500: '#181f58',
    950: '#000000',
  },
}

SCSS

$custom: #181f58;
$custom-light: #5e5a88;
$custom-dark: #000000;

JSON

{
  "hex": "#181f58",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 88
  },
  "hsl": {
    "h": 233.438,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.27304,
    "c": 0.10211,
    "h": 272.4
  },
  "luminance": 0.01879
}

Semantic roles & 50–950 ramp

primary

#181F58

secondary

#8F863D

accent

#D047E0

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F58

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

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