#181F45#181F45

#181F45 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.6% C 0.071 H 272.5°. Best body text is #FFFFFF at 15.90:1 contrast (WCAG AA passes).

Color values

HEX	#181F45
RGB	rgb(24, 31, 69)
HSL	hsl(231, 48%, 18%)
HSV	hsv(231, 65%, 27%)
CMYK	cmyk(65.2%, 55.1%, 0%, 72.9%)
CIE-LAB	lab(13.25, 10.57, -24.97)
CIE-LCH	lch(13.25, 27.12, 292.93°)
OKLab	oklab(25.62% 0.0032 -0.0714)
OKLCH	oklch(25.62% 0.071 272.5)
XYZ	xyz(1.9405, 1.6037, 5.8364)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F45 #453E18

analogous

#183545 #181F45 #271845

triadic

#181F45 #45181F #1F4518

tetradic

#181F45 #451835 #453E18 #184527

square

#181F45 #451835 #453E18 #184527

split-complementary

#181F45 #452718 #354518

monochromatic

#080A17 #080B18 #181F45 #283372 #3848A0

Accessibility & contrast

On white

15.90

#181F45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181F45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F45

15.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F45	#FFFFFF	#000000	##FFFFFF
##181F45	1.00	15.90	1.32	15.90
#FFFFFF	15.90	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C2446

Deuteranopia (green-blind)

#052044

Tritanopia (blue-blind)

#00282E

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181f45;
/* rgb */ color: rgb(24, 31, 69);
/* oklch */ color: oklch(25.6% 0.071 272.5);

Tailwind

colors: {
  custom: {
    50: '#5a5a79',
    500: '#181f45',
    950: '#000000',
  },
}

SCSS

$custom: #181f45;
$custom-light: #5a5a79;
$custom-dark: #000000;

JSON

{
  "hex": "#181f45",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 69
  },
  "hsl": {
    "h": 230.667,
    "s": 48.387,
    "l": 18.235
  },
  "oklch": {
    "l": 0.25616,
    "c": 0.07143,
    "h": 272.5
  },
  "luminance": 0.01604
}

Semantic roles & 50–950 ramp

primary

#181F45

secondary

#7C723D

accent

#C350D8

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040309

muted

#79787B

Preview Lab

Preview with #181F45

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

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