#181C4F#181C4F

#181C4F is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.8% C 0.092 H 274.5°. Best body text is #FFFFFF at 15.94:1 contrast (WCAG AA passes).

Color values

HEX	#181C4F
RGB	rgb(24, 28, 79)
HSL	hsl(236, 53%, 20%)
HSV	hsv(236, 70%, 31%)
CMYK	cmyk(69.6%, 64.6%, 0%, 69%)
CIE-LAB	lab(13.16, 16.85, -32.02)
CIE-LCH	lch(13.16, 36.18, 297.76°)
OKLab	oklab(25.81% 0.0073 -0.0921)
OKLCH	oklch(25.81% 0.092 274.5)
XYZ	xyz(2.2028, 1.5890, 7.5863)
Luminance	0.0159 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C4F #4F4B18

analogous

#18384F #181C4F #2F184F

triadic

#181C4F #4F181C #1C4F18

tetradic

#181C4F #4F1838 #4F4B18 #184F2F

square

#181C4F #4F1838 #4F4B18 #184F2F

split-complementary

#181C4F #4F2F18 #384F18

monochromatic

#070817 #0A0B20 #181C4F #262D7E #353DAD

Accessibility & contrast

On white

15.94

#181C4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181C4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C4F

15.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C4F	#FFFFFF	#000000	##FFFFFF
##181C4F	1.00	15.94	1.32	15.94
#FFFFFF	15.94	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002451

Deuteranopia (green-blind)

#00204E

Tritanopia (blue-blind)

#002832

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181c4f;
/* rgb */ color: rgb(24, 28, 79);
/* oklch */ color: oklch(25.8% 0.092 274.5);

Tailwind

colors: {
  custom: {
    50: '#5c5881',
    500: '#181c4f',
    950: '#000000',
  },
}

SCSS

$custom: #181c4f;
$custom-light: #5c5881;
$custom-dark: #000000;

JSON

{
  "hex": "#181c4f",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 79
  },
  "hsl": {
    "h": 235.636,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.2581,
    "c": 0.0924,
    "h": 274.5
  },
  "luminance": 0.01589
}

Semantic roles & 50–950 ramp

primary

#181C4F

secondary

#86813D

accent

#D24BDD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181C4F

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

Preview Lab → · Contrast checker → · Palette generator →