#181757#181757

#181757 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.6% C 0.112 H 275.8°. Best body text is #FFFFFF at 16.17:1 contrast (WCAG AA passes).

Color values

HEX	#181757
RGB	rgb(24, 23, 87)
HSL	hsl(241, 58%, 22%)
HSV	hsv(241, 74%, 34%)
CMYK	cmyk(72.4%, 73.6%, 0%, 65.9%)
CIE-LAB	lab(12.58, 23.57, -38.42)
CIE-LCH	lch(12.58, 45.08, 301.53°)
OKLab	oklab(25.62% 0.0113 -0.1109)
OKLCH	oklch(25.62% 0.112 275.8)
XYZ	xyz(2.4028, 1.4949, 9.1769)
Luminance	0.0149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181757 #565717

analogous

#173657 #181757 #381757

triadic

#181757 #571817 #175718

tetradic

#181757 #571736 #565717 #175738

square

#181757 #571736 #565717 #175738

split-complementary

#181757 #573817 #365717

monochromatic

#070618 #0B0A27 #181757 #252487 #3331B8

Accessibility & contrast

On white

16.17

#181757 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181757 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181757

16.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181757	#FFFFFF	#000000	##FFFFFF
##181757	1.00	16.17	1.30	16.17
#FFFFFF	16.17	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002459

Deuteranopia (green-blind)

#001E56

Tritanopia (blue-blind)

#002834

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181757;
/* rgb */ color: rgb(24, 23, 87);
/* oklch */ color: oklch(25.6% 0.112 275.8);

Tailwind

colors: {
  custom: {
    50: '#5f5487',
    500: '#181757',
    950: '#000000',
  },
}

SCSS

$custom: #181757;
$custom-light: #5f5487;
$custom-dark: #000000;

JSON

{
  "hex": "#181757",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 87
  },
  "hsl": {
    "h": 240.938,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.2562,
    "c": 0.1115,
    "h": 275.8
  },
  "luminance": 0.01495
}

Semantic roles & 50–950 ramp

primary

#181757

secondary

#8D8E3C

accent

#E146DF

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181757

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

Preview Lab → · Contrast checker → · Palette generator →