#181C63#181C63

#181C63 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.8% C 0.122 H 272.8°. Best body text is #FFFFFF at 15.16:1 contrast (WCAG AA passes).

Color values

HEX	#181C63
RGB	rgb(24, 28, 99)
HSL	hsl(237, 61%, 24%)
HSV	hsv(237, 76%, 39%)
CMYK	cmyk(75.8%, 71.7%, 0%, 61.2%)
CIE-LAB	lab(15.09, 24.76, -42.32)
CIE-LCH	lch(15.09, 49.03, 300.33°)
OKLab	oklab(27.82% 0.0059 -0.1223)
OKLCH	oklch(27.82% 0.122 272.8)
XYZ	xyz(3.0433, 1.9252, 12.0132)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C63 #635F18

analogous

#184263 #181C63 #3A1863

triadic

#181C63 #63181C #1C6318

tetradic

#181C63 #631842 #635F18 #18633A

square

#181C63 #631842 #635F18 #18633A

split-complementary

#181C63 #633A18 #426318

monochromatic

#060719 #0C0E32 #181C63 #242A94 #3038C6

Accessibility & contrast

On white

15.16

#181C63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181C63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C63

15.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C63	#FFFFFF	#000000	##FFFFFF
##181C63	1.00	15.16	1.39	15.16
#FFFFFF	15.16	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002965

Deuteranopia (green-blind)

#002262

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181c63;
/* rgb */ color: rgb(24, 28, 99);
/* oklch */ color: oklch(27.8% 0.122 272.8);

Tailwind

colors: {
  custom: {
    50: '#625890',
    500: '#181c63',
    950: '#000000',
  },
}

SCSS

$custom: #181c63;
$custom-light: #625890;
$custom-dark: #000000;

JSON

{
  "hex": "#181c63",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 99
  },
  "hsl": {
    "h": 236.8,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.27819,
    "c": 0.12247,
    "h": 272.8
  },
  "luminance": 0.01926
}

Semantic roles & 50–950 ramp

primary

#181C63

secondary

#99943E

accent

#DC44E4

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #181C63

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

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