#181C4E#181C4E

#181C4E is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.7% C 0.091 H 274.6°. Best body text is #FFFFFF at 15.97:1 contrast (WCAG AA passes).

Color values

HEX	#181C4E
RGB	rgb(24, 28, 78)
HSL	hsl(236, 53%, 20%)
HSV	hsv(236, 69%, 31%)
CMYK	cmyk(69.2%, 64.1%, 0%, 69.4%)
CIE-LAB	lab(13.07, 16.45, -31.47)
CIE-LCH	lch(13.07, 35.51, 297.59°)
OKLab	oklab(25.72% 0.0073 -0.0905)
OKLCH	oklch(25.72% 0.091 274.6)
XYZ	xyz(2.1666, 1.5746, 7.3960)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C4E #4E4A18

analogous

#18374E #181C4E #2F184E

triadic

#181C4E #4E181C #1C4E18

tetradic

#181C4E #4E1837 #4E4A18 #184E2F

square

#181C4E #4E1837 #4E4A18 #184E2F

split-complementary

#181C4E #4E2F18 #374E18

monochromatic

#070817 #0A0B1F #181C4E #262D7D #353EAC

Accessibility & contrast

On white

15.97

#181C4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181C4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C4E

15.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C4E	#FFFFFF	#000000	##FFFFFF
##181C4E	1.00	15.97	1.32	15.97
#FFFFFF	15.97	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002450

Deuteranopia (green-blind)

#001F4D

Tritanopia (blue-blind)

#002831

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181c4e;
/* rgb */ color: rgb(24, 28, 78);
/* oklch */ color: oklch(25.7% 0.091 274.6);

Tailwind

colors: {
  custom: {
    50: '#5c5880',
    500: '#181c4e',
    950: '#000000',
  },
}

SCSS

$custom: #181c4e;
$custom-light: #5c5880;
$custom-dark: #000000;

JSON

{
  "hex": "#181c4e",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 78
  },
  "hsl": {
    "h": 235.556,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.25717,
    "c": 0.09081,
    "h": 274.6
  },
  "luminance": 0.01575
}

Semantic roles & 50–950 ramp

primary

#181C4E

secondary

#857F3D

accent

#D24BDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181C4E

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

Preview Lab → · Contrast checker → · Palette generator →