#181B59#181B59

#181B59 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.109 H 274.1°. Best body text is #FFFFFF at 15.67:1 contrast (WCAG AA passes).

Color values

HEX	#181B59
RGB	rgb(24, 27, 89)
HSL	hsl(237, 58%, 22%)
HSV	hsv(237, 73%, 35%)
CMYK	cmyk(73%, 69.7%, 0%, 65.1%)
CIE-LAB	lab(13.82, 21.55, -37.73)
CIE-LCH	lch(13.82, 43.45, 299.74°)
OKLab	oklab(26.59% 0.0077 -0.1089)
OKLCH	oklch(26.59% 0.109 274.1)
XYZ	xyz(2.5712, 1.6991, 9.6417)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B59 #595618

analogous

#183C59 #181B59 #361859

triadic

#181B59 #59181B #1B5918

tetradic

#181B59 #59183C #595618 #185936

square

#181B59 #59183C #595618 #185936

split-complementary

#181B59 #593618 #3C5918

monochromatic

#060718 #0B0C29 #181B59 #252A89 #3238B9

Accessibility & contrast

On white

15.67

#181B59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181B59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B59

15.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B59	#FFFFFF	#000000	##FFFFFF
##181B59	1.00	15.67	1.34	15.67
#FFFFFF	15.67	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265B

Deuteranopia (green-blind)

#002058

Tritanopia (blue-blind)

#002B37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181b59;
/* rgb */ color: rgb(24, 27, 89);
/* oklch */ color: oklch(26.6% 0.109 274.1);

Tailwind

colors: {
  custom: {
    50: '#5f5789',
    500: '#181b59',
    950: '#000000',
  },
}

SCSS

$custom: #181b59;
$custom-light: #5f5789;
$custom-dark: #000000;

JSON

{
  "hex": "#181b59",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 89
  },
  "hsl": {
    "h": 237.231,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26587,
    "c": 0.10916,
    "h": 274.1
  },
  "luminance": 0.01699
}

Semantic roles & 50–950 ramp

primary

#181B59

secondary

#908C3D

accent

#DA47E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181B59

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

Preview Lab → · Contrast checker → · Palette generator →