#18237C#18237C

#18237C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.149 H 269.6°. Best body text is #FFFFFF at 13.37:1 contrast (WCAG AA passes).

Color values

HEX	#18237C
RGB	rgb(24, 35, 124)
HSL	hsl(233, 68%, 29%)
HSV	hsv(233, 81%, 49%)
CMYK	cmyk(80.6%, 71.8%, 0%, 51.4%)
CIE-LAB	lab(19.44, 29.66, -51.39)
CIE-LCH	lch(19.44, 59.33, 299.99°)
OKLab	oklab(31.76% -0.0011 -0.1488)
OKLCH	oklch(31.76% 0.149 269.6)
XYZ	xyz(4.6146, 2.8510, 19.3720)
Luminance	0.0285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18237C #7C7118

analogous

#18557C #18237C #3F187C

triadic

#18237C #7C1823 #237C18

tetradic

#18237C #7C1855 #7C7118 #187C3F

square

#18237C #7C1855 #7C7118 #187C3F

split-complementary

#18237C #7C3F18 #557C18

monochromatic

#05071A #0E1549 #18237C #2231AF #3648D8

Accessibility & contrast

On white

13.37

#18237C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#18237C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18237C

13.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18237C	#FFFFFF	#000000	##FFFFFF
##18237C	1.00	13.37	1.57	13.37
#FFFFFF	13.37	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347F

Deuteranopia (green-blind)

#002A7A

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #18237c;
/* rgb */ color: rgb(24, 35, 124);
/* oklch */ color: oklch(31.8% 0.149 269.6);

Tailwind

colors: {
  custom: {
    50: '#685ea3',
    500: '#18237c',
    950: '#000000',
  },
}

SCSS

$custom: #18237c;
$custom-light: #685ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#18237c",
  "rgb": {
    "r": 24,
    "g": 35,
    "b": 124
  },
  "hsl": {
    "h": 233.4,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31756,
    "c": 0.1488,
    "h": 269.6
  },
  "luminance": 0.02851
}

Semantic roles & 50–950 ramp

primary

#18237C

secondary

#B1A43F

accent

#D73DEA

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #18237C

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

Preview Lab → · Contrast checker → · Palette generator →