#181B8C#181B8C

#181B8C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.178 H 269.8°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#181B8C
RGB	rgb(24, 27, 140)
HSL	hsl(238, 71%, 32%)
HSV	hsv(238, 83%, 55%)
CMYK	cmyk(82.9%, 80.7%, 0%, 45.1%)
CIE-LAB	lab(19.52, 40.30, -61.34)
CIE-LCH	lch(19.52, 73.40, 303.30°)
OKLab	oklab(32.35% -0.0005 -0.1777)
OKLCH	oklch(32.35% 0.178 269.8)
XYZ	xyz(5.5006, 2.8709, 25.0701)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B8C #8C8918

analogous

#18558C #181B8C #4F188C

triadic

#181B8C #8C181B #1B8C18

tetradic

#181B8C #8C1855 #8C8918 #188C4F

square

#181B8C #8C1855 #8C8918 #188C4F

split-complementary

#181B8C #8C4F18 #558C18

monochromatic

#060724 #0F1158 #181B8C #2125C0 #4044DE

Accessibility & contrast

On white

13.34

#181B8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#181B8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8C

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B8C	#FFFFFF	#000000	##FFFFFF
##181B8C	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358F

Deuteranopia (green-blind)

#00298A

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #181b8c;
/* rgb */ color: rgb(24, 27, 140);
/* oklch */ color: oklch(32.4% 0.178 269.8);

Tailwind

colors: {
  custom: {
    50: '#6d5aaf',
    500: '#181b8c',
    950: '#000000',
  },
}

SCSS

$custom: #181b8c;
$custom-light: #6d5aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#181b8c",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 140
  },
  "hsl": {
    "h": 238.448,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.3235,
    "c": 0.17766,
    "h": 269.8
  },
  "luminance": 0.02872
}

Semantic roles & 50–950 ramp

primary

#181B8C

secondary

#BFBC41

accent

#E93AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #181B8C

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

Preview Lab → · Contrast checker → · Palette generator →