#18237B#18237B

#18237B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.147 H 269.6°. Best body text is #FFFFFF at 13.42:1 contrast (WCAG AA passes).

Color values

HEX	#18237B
RGB	rgb(24, 35, 123)
HSL	hsl(233, 67%, 29%)
HSV	hsv(233, 80%, 48%)
CMYK	cmyk(80.5%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(19.33, 29.28, -50.92)
CIE-LCH	lch(19.33, 58.74, 299.89°)
OKLab	oklab(31.65% -0.001 -0.1474)
OKLCH	oklch(31.65% 0.147 269.6)
XYZ	xyz(4.5516, 2.8258, 19.0406)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18237B #7B7018

analogous

#18557B #18237B #3F187B

triadic

#18237B #7B1823 #237B18

tetradic

#18237B #7B1855 #7B7018 #187B3F

square

#18237B #7B1855 #7B7018 #187B3F

split-complementary

#18237B #7B3F18 #557B18

monochromatic

#05071A #0E1448 #18237B #2232AE #3648D8

Accessibility & contrast

On white

13.42

#18237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#18237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18237B

13.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18237B	#FFFFFF	#000000	##FFFFFF
##18237B	1.00	13.42	1.57	13.42
#FFFFFF	13.42	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002A79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #18237b;
/* rgb */ color: rgb(24, 35, 123);
/* oklch */ color: oklch(31.6% 0.147 269.6);

Tailwind

colors: {
  custom: {
    50: '#685ea2',
    500: '#18237b',
    950: '#000000',
  },
}

SCSS

$custom: #18237b;
$custom-light: #685ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#18237b",
  "rgb": {
    "r": 24,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 233.333,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31648,
    "c": 0.14744,
    "h": 269.6
  },
  "luminance": 0.02826
}

Semantic roles & 50–950 ramp

primary

#18237B

secondary

#B0A33F

accent

#D73EEA

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #18237B

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

Preview Lab → · Contrast checker → · Palette generator →