#181F7C#181F7C

#181F7C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.1% C 0.153 H 270.3°. Best body text is #FFFFFF at 13.76:1 contrast (WCAG AA passes).

Color values

HEX	#181F7C
RGB	rgb(24, 31, 124)
HSL	hsl(236, 68%, 29%)
HSV	hsv(236, 81%, 49%)
CMYK	cmyk(80.6%, 75%, 0%, 51.4%)
CIE-LAB	lab(18.49, 32.26, -52.95)
CIE-LCH	lch(18.49, 62.00, 301.35°)
OKLab	oklab(31.08% 0.0008 -0.1533)
OKLCH	oklch(31.08% 0.153 270.3)
XYZ	xyz(4.5035, 2.6289, 19.3350)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F7C #7C7518

analogous

#18517C #181F7C #43187C

triadic

#181F7C #7C181F #1F7C18

tetradic

#181F7C #7C1851 #7C7518 #187C43

square

#181F7C #7C1851 #7C7518 #187C43

split-complementary

#181F7C #7C4318 #517C18

monochromatic

#05061A #0E1249 #181F7C #222CAF #3642D8

Accessibility & contrast

On white

13.76

#181F7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#181F7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F7C

13.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F7C	#FFFFFF	#000000	##FFFFFF
##181F7C	1.00	13.76	1.53	13.76
#FFFFFF	13.76	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327F

Deuteranopia (green-blind)

#00287A

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #181f7c;
/* rgb */ color: rgb(24, 31, 124);
/* oklch */ color: oklch(31.1% 0.153 270.3);

Tailwind

colors: {
  custom: {
    50: '#685ba3',
    500: '#181f7c',
    950: '#000000',
  },
}

SCSS

$custom: #181f7c;
$custom-light: #685ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#181f7c",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 124
  },
  "hsl": {
    "h": 235.8,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31076,
    "c": 0.15333,
    "h": 270.3
  },
  "luminance": 0.02629
}

Semantic roles & 50–950 ramp

primary

#181F7C

secondary

#B1A93F

accent

#DE3DEA

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #181F7C

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

Preview Lab → · Contrast checker → · Palette generator →