#181C5F#181C5F

#181C5F is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.4% C 0.117 H 273.1°. Best body text is #FFFFFF at 15.33:1 contrast (WCAG AA passes).

Color values

HEX	#181C5F
RGB	rgb(24, 28, 95)
HSL	hsl(237, 60%, 23%)
HSV	hsv(237, 75%, 37%)
CMYK	cmyk(74.7%, 70.5%, 0%, 62.7%)
CIE-LAB	lab(14.68, 23.21, -40.33)
CIE-LCH	lch(14.68, 46.53, 299.91°)
OKLab	oklab(27.4% 0.0064 -0.1165)
OKLCH	oklch(27.4% 0.117 273.1)
XYZ	xyz(2.8568, 1.8506, 11.0309)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C5F #5F5B18

analogous

#183F5F #181C5F #37185F

triadic

#181C5F #5F181C #1C5F18

tetradic

#181C5F #5F183F #5F5B18 #185F37

square

#181C5F #5F183F #5F5B18 #185F37

split-complementary

#181C5F #5F3718 #3F5F18

monochromatic

#060718 #0C0E2E #181C5F #242A90 #3139C1

Accessibility & contrast

On white

15.33

#181C5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181C5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C5F

15.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C5F	#FFFFFF	#000000	##FFFFFF
##181C5F	1.00	15.33	1.37	15.33
#FFFFFF	15.33	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002861

Deuteranopia (green-blind)

#00225E

Tritanopia (blue-blind)

#002E3A

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181c5f;
/* rgb */ color: rgb(24, 28, 95);
/* oklch */ color: oklch(27.4% 0.117 273.1);

Tailwind

colors: {
  custom: {
    50: '#61588d',
    500: '#181c5f',
    950: '#000000',
  },
}

SCSS

$custom: #181c5f;
$custom-light: #61588d;
$custom-dark: #000000;

JSON

{
  "hex": "#181c5f",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 95
  },
  "hsl": {
    "h": 236.62,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.27398,
    "c": 0.11669,
    "h": 273.1
  },
  "luminance": 0.01851
}

Semantic roles & 50–950 ramp

primary

#181C5F

secondary

#95903D

accent

#DA45E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181C5F

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

Preview Lab → · Contrast checker → · Palette generator →