#181958#181958

#181958 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.1% C 0.110 H 274.9°. Best body text is #FFFFFF at 15.92:1 contrast (WCAG AA passes).

Color values

HEX	#181958
RGB	rgb(24, 25, 88)
HSL	hsl(239, 57%, 22%)
HSV	hsv(239, 73%, 35%)
CMYK	cmyk(72.7%, 71.6%, 0%, 65.5%)
CIE-LAB	lab(13.19, 22.57, -38.08)
CIE-LCH	lch(13.19, 44.27, 300.66°)
OKLab	oklab(26.1% 0.0095 -0.1099)
OKLCH	oklch(26.1% 0.11 274.9)
XYZ	xyz(2.4852, 1.5938, 9.4073)
Luminance	0.0159 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181958 #585718

analogous

#183958 #181958 #371858

triadic

#181958 #581819 #195818

tetradic

#181958 #581839 #585718 #185837

square

#181958 #581839 #585718 #185837

split-complementary

#181958 #583718 #395818

monochromatic

#070718 #0B0B28 #181958 #252788 #3234B8

Accessibility & contrast

On white

15.92

#181958 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181958 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181958

15.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181958	#FFFFFF	#000000	##FFFFFF
##181958	1.00	15.92	1.32	15.92
#FFFFFF	15.92	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255A

Deuteranopia (green-blind)

#001F57

Tritanopia (blue-blind)

#002A36

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181958;
/* rgb */ color: rgb(24, 25, 88);
/* oklch */ color: oklch(26.1% 0.110 274.9);

Tailwind

colors: {
  custom: {
    50: '#5f5688',
    500: '#181958',
    950: '#000000',
  },
}

SCSS

$custom: #181958;
$custom-light: #5f5688;
$custom-dark: #000000;

JSON

{
  "hex": "#181958",
  "rgb": {
    "r": 24,
    "g": 25,
    "b": 88
  },
  "hsl": {
    "h": 239.063,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26098,
    "c": 0.11035,
    "h": 274.9
  },
  "luminance": 0.01594
}

Semantic roles & 50–950 ramp

primary

#181958

secondary

#8F8D3D

accent

#DE47E0

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181958

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

Preview Lab → · Contrast checker → · Palette generator →