#181C5C#181C5C

#181C5C is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.1% C 0.112 H 273.4°. Best body text is #FFFFFF at 15.45:1 contrast (WCAG AA passes).

Color values

HEX	#181C5C
RGB	rgb(24, 28, 92)
HSL	hsl(236, 59%, 23%)
HSV	hsv(236, 74%, 36%)
CMYK	cmyk(73.9%, 69.6%, 0%, 63.9%)
CIE-LAB	lab(14.38, 22.03, -38.82)
CIE-LCH	lch(14.38, 44.63, 299.57°)
OKLab	oklab(27.09% 0.0066 -0.1121)
OKLCH	oklch(27.09% 0.112 273.4)
XYZ	xyz(2.7231, 1.7971, 10.3265)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C5C #5C5818

analogous

#183E5C #181C5C #36185C

triadic

#181C5C #5C181C #1C5C18

tetradic

#181C5C #5C183E #5C5818 #185C36

square

#181C5C #5C183E #5C5818 #185C36

split-complementary

#181C5C #5C3618 #3E5C18

monochromatic

#060718 #0B0D2B #181C5C #252B8D #313ABD

Accessibility & contrast

On white

15.45

#181C5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181C5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C5C

15.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C5C	#FFFFFF	#000000	##FFFFFF
##181C5C	1.00	15.45	1.36	15.45
#FFFFFF	15.45	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285E

Deuteranopia (green-blind)

#00215B

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181c5c;
/* rgb */ color: rgb(24, 28, 92);
/* oklch */ color: oklch(27.1% 0.112 273.4);

Tailwind

colors: {
  custom: {
    50: '#60588b',
    500: '#181c5c',
    950: '#000000',
  },
}

SCSS

$custom: #181c5c;
$custom-light: #60588b;
$custom-dark: #000000;

JSON

{
  "hex": "#181c5c",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 92
  },
  "hsl": {
    "h": 236.471,
    "s": 58.621,
    "l": 22.745
  },
  "oklch": {
    "l": 0.27089,
    "c": 0.11228,
    "h": 273.4
  },
  "luminance": 0.01797
}

Semantic roles & 50–950 ramp

primary

#181C5C

secondary

#938E3D

accent

#D946E2

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181C5C

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

Preview Lab → · Contrast checker → · Palette generator →