#181D5C#181D5C

#181D5C is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.3% C 0.111 H 273.0°. Best body text is #FFFFFF at 15.34:1 contrast (WCAG AA passes).

Color values

HEX	#181D5C
RGB	rgb(24, 29, 92)
HSL	hsl(236, 59%, 23%)
HSV	hsv(236, 74%, 36%)
CMYK	cmyk(73.9%, 68.5%, 0%, 63.9%)
CIE-LAB	lab(14.65, 21.32, -38.38)
CIE-LCH	lch(14.65, 43.90, 299.05°)
OKLab	oklab(27.29% 0.0058 -0.1108)
OKLCH	oklch(27.29% 0.111 273)
XYZ	xyz(2.7472, 1.8454, 10.3346)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D5C #5C5718

analogous

#183F5C #181D5C #35185C

triadic

#181D5C #5C181D #1D5C18

tetradic

#181D5C #5C183F #5C5718 #185C35

square

#181D5C #5C183F #5C5718 #185C35

split-complementary

#181D5C #5C3518 #3F5C18

monochromatic

#060818 #0B0E2B #181D5C #252C8D #313CBD

Accessibility & contrast

On white

15.34

#181D5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181D5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D5C

15.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D5C	#FFFFFF	#000000	##FFFFFF
##181D5C	1.00	15.34	1.37	15.34
#FFFFFF	15.34	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285E

Deuteranopia (green-blind)

#00225B

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181d5c;
/* rgb */ color: rgb(24, 29, 92);
/* oklch */ color: oklch(27.3% 0.111 273.0);

Tailwind

colors: {
  custom: {
    50: '#60598b',
    500: '#181d5c',
    950: '#000000',
  },
}

SCSS

$custom: #181d5c;
$custom-light: #60598b;
$custom-dark: #000000;

JSON

{
  "hex": "#181d5c",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 92
  },
  "hsl": {
    "h": 235.588,
    "s": 58.621,
    "l": 22.745
  },
  "oklch": {
    "l": 0.27286,
    "c": 0.11094,
    "h": 273
  },
  "luminance": 0.01846
}

Semantic roles & 50–950 ramp

primary

#181D5C

secondary

#938C3D

accent

#D646E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #181D5C

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

Preview Lab → · Contrast checker → · Palette generator →