#181F4C#181F4C

#181F4C is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.2% C 0.083 H 272.7°. Best body text is #FFFFFF at 15.68:1 contrast (WCAG AA passes).

Color values

HEX	#181F4C
RGB	rgb(24, 31, 76)
HSL	hsl(232, 52%, 20%)
HSV	hsv(232, 68%, 30%)
CMYK	cmyk(68.4%, 59.2%, 0%, 70.2%)
CIE-LAB	lab(13.80, 13.40, -28.92)
CIE-LCH	lch(13.80, 31.88, 294.86°)
OKLab	oklab(26.21% 0.0039 -0.083)
OKLCH	oklch(26.21% 0.083 272.7)
XYZ	xyz(2.1707, 1.6958, 7.0490)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.20

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F4C #4C4518

analogous

#18394C #181F4C #2B184C

triadic

#181F4C #4C181F #1F4C18

tetradic

#181F4C #4C1839 #4C4518 #184C2B

square

#181F4C #4C1839 #4C4518 #184C2B

split-complementary

#181F4C #4C2B18 #394C18

monochromatic

#070917 #090C1D #181F4C #27327B #3545A9

Accessibility & contrast

On white

15.68

#181F4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181F4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F4C

15.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F4C	#FFFFFF	#000000	##FFFFFF
##181F4C	1.00	15.68	1.34	15.68
#FFFFFF	15.68	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03264E

Deuteranopia (green-blind)

#00214B

Tritanopia (blue-blind)

#002A32

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181f4c;
/* rgb */ color: rgb(24, 31, 76);
/* oklch */ color: oklch(26.2% 0.083 272.7);

Tailwind

colors: {
  custom: {
    50: '#5b5a7e',
    500: '#181f4c',
    950: '#000000',
  },
}

SCSS

$custom: #181f4c;
$custom-light: #5b5a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#181f4c",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 76
  },
  "hsl": {
    "h": 231.923,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.26207,
    "c": 0.08307,
    "h": 272.7
  },
  "luminance": 0.01696
}

Semantic roles & 50–950 ramp

primary

#181F4C

secondary

#83793D

accent

#C84CDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181F4C

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

Preview Lab → · Contrast checker → · Palette generator →