#181C59#181C59

#181C59 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.8% C 0.108 H 273.6°. Best body text is #FFFFFF at 15.56:1 contrast (WCAG AA passes).

Color values

HEX	#181C59
RGB	rgb(24, 28, 89)
HSL	hsl(236, 58%, 22%)
HSV	hsv(236, 73%, 35%)
CMYK	cmyk(73%, 68.5%, 0%, 65.1%)
CIE-LAB	lab(14.09, 20.84, -37.29)
CIE-LCH	lch(14.09, 42.72, 299.20°)
OKLab	oklab(26.78% 0.0069 -0.1076)
OKLCH	oklch(26.78% 0.108 273.6)
XYZ	xyz(2.5945, 1.7457, 9.6495)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C59 #595518

analogous

#183D59 #181C59 #351859

triadic

#181C59 #59181C #1C5918

tetradic

#181C59 #59183D #595518 #185935

square

#181C59 #59183D #595518 #185935

split-complementary

#181C59 #593518 #3D5918

monochromatic

#060818 #0B0D29 #181C59 #252B89 #323AB9

Accessibility & contrast

On white

15.56

#181C59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181C59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C59

15.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C59	#FFFFFF	#000000	##FFFFFF
##181C59	1.00	15.56	1.35	15.56
#FFFFFF	15.56	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275B

Deuteranopia (green-blind)

#002158

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181c59;
/* rgb */ color: rgb(24, 28, 89);
/* oklch */ color: oklch(26.8% 0.108 273.6);

Tailwind

colors: {
  custom: {
    50: '#5f5889',
    500: '#181c59',
    950: '#000000',
  },
}

SCSS

$custom: #181c59;
$custom-light: #5f5889;
$custom-dark: #000000;

JSON

{
  "hex": "#181c59",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 89
  },
  "hsl": {
    "h": 236.308,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26785,
    "c": 0.10781,
    "h": 273.6
  },
  "luminance": 0.01746
}

Semantic roles & 50–950 ramp

primary

#181C59

secondary

#908B3D

accent

#D747E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181C59

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

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