#18337B#18337B

#18337B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.8% C 0.127 H 264.9°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#18337B
RGB	rgb(24, 51, 123)
HSL	hsl(224, 67%, 29%)
HSV	hsv(224, 80%, 48%)
CMYK	cmyk(80.5%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(23.64, 18.14, -43.87)
CIE-LCH	lch(23.64, 47.47, 292.46°)
OKLab	oklab(34.84% -0.0114 -0.1266)
OKLCH	oklch(34.84% 0.127 264.9)
XYZ	xyz(5.1344, 3.9913, 19.2349)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18337B #7B6018

analogous

#18657B #18337B #2F187B

triadic

#18337B #7B1833 #337B18

tetradic

#18337B #7B1865 #7B6018 #187B2F

square

#18337B #7B1865 #7B6018 #187B2F

split-complementary

#18337B #7B2F18 #657B18

monochromatic

#050B1A #0E1E48 #18337B #2248AE #3662D8

Accessibility & contrast

On white

11.68

#18337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#18337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18337B

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18337B	#FFFFFF	#000000	##FFFFFF
##18337B	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00347A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #18337b;
/* rgb */ color: rgb(24, 51, 123);
/* oklch */ color: oklch(34.8% 0.127 264.9);

Tailwind

colors: {
  custom: {
    50: '#666aa2',
    500: '#18337b',
    950: '#000000',
  },
}

SCSS

$custom: #18337b;
$custom-light: #666aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#18337b",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 223.636,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.34835,
    "c": 0.12712,
    "h": 264.9
  },
  "luminance": 0.03992
}

Semantic roles & 50–950 ramp

primary

#18337B

secondary

#B0913F

accent

#BB3EEA

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #18337B

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

Preview Lab → · Contrast checker → · Palette generator →