#181858#181858

#181858 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.112 H 275.3°. Best body text is #FFFFFF at 16.03:1 contrast (WCAG AA passes).

Color values

HEX	#181858
RGB	rgb(24, 24, 88)
HSL	hsl(240, 57%, 22%)
HSV	hsv(240, 73%, 35%)
CMYK	cmyk(72.7%, 72.7%, 0%, 65.5%)
CIE-LAB	lab(12.93, 23.27, -38.51)
CIE-LCH	lch(12.93, 44.99, 301.14°)
OKLab	oklab(25.91% 0.0103 -0.1112)
OKLCH	oklch(25.91% 0.112 275.3)
XYZ	xyz(2.4642, 1.5518, 9.4003)
Luminance	0.0155 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181858 #585818

analogous

#183858 #181858 #381858

triadic

#181858 #581818 #185818

tetradic

#181858 #581838 #585818 #185838

square

#181858 #581838 #585818 #185838

split-complementary

#181858 #583818 #385818

monochromatic

#070718 #0B0B28 #181858 #252588 #3232B8

Accessibility & contrast

On white

16.03

#181858 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181858 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181858

16.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181858	#FFFFFF	#000000	##FFFFFF
##181858	1.00	16.03	1.31	16.03
#FFFFFF	16.03	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245A

Deuteranopia (green-blind)

#001E57

Tritanopia (blue-blind)

#002935

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181858;
/* rgb */ color: rgb(24, 24, 88);
/* oklch */ color: oklch(25.9% 0.112 275.3);

Tailwind

colors: {
  custom: {
    50: '#5f5588',
    500: '#181858',
    950: '#000000',
  },
}

SCSS

$custom: #181858;
$custom-light: #5f5588;
$custom-dark: #000000;

JSON

{
  "hex": "#181858",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 88
  },
  "hsl": {
    "h": 240,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.2591,
    "c": 0.11167,
    "h": 275.3
  },
  "luminance": 0.01552
}

Semantic roles & 50–950 ramp

primary

#181858

secondary

#8F8F3D

accent

#E047E0

background

#F5F4F8

surface

#EAE8F0

border

#C6C4CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181858

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

Preview Lab → · Contrast checker → · Palette generator →