#18287B#18287B

#18287B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.6% C 0.141 H 268.4°. Best body text is #FFFFFF at 12.90:1 contrast (WCAG AA passes).

Color values

HEX	#18287B
RGB	rgb(24, 40, 123)
HSL	hsl(230, 67%, 29%)
HSV	hsv(230, 80%, 48%)
CMYK	cmyk(80.5%, 67.5%, 0%, 51.8%)
CIE-LAB	lab(20.60, 25.88, -48.84)
CIE-LCH	lch(20.60, 55.27, 297.92°)
OKLab	oklab(32.57% -0.0039 -0.1413)
OKLCH	oklch(32.57% 0.141 268.4)
XYZ	xyz(4.7094, 3.1413, 19.0932)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18287B #7B6B18

analogous

#185A7B #18287B #3A187B

triadic

#18287B #7B1828 #287B18

tetradic

#18287B #7B185A #7B6B18 #187B3A

square

#18287B #7B185A #7B6B18 #187B3A

split-complementary

#18287B #7B3A18 #5A7B18

monochromatic

#05081A #0E1748 #18287B #2239AE #3650D8

Accessibility & contrast

On white

12.90

#18287B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#18287B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18287B

12.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18287B	#FFFFFF	#000000	##FFFFFF
##18287B	1.00	12.90	1.63	12.90
#FFFFFF	12.90	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #18287b;
/* rgb */ color: rgb(24, 40, 123);
/* oklch */ color: oklch(32.6% 0.141 268.4);

Tailwind

colors: {
  custom: {
    50: '#6761a2',
    500: '#18287b',
    950: '#000000',
  },
}

SCSS

$custom: #18287b;
$custom-light: #6761a2;
$custom-dark: #000000;

JSON

{
  "hex": "#18287b",
  "rgb": {
    "r": 24,
    "g": 40,
    "b": 123
  },
  "hsl": {
    "h": 230.303,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.32573,
    "c": 0.14138,
    "h": 268.4
  },
  "luminance": 0.03142
}

Semantic roles & 50–950 ramp

primary

#18287B

secondary

#B09D3F

accent

#CE3EEA

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #18287B

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

Preview Lab → · Contrast checker → · Palette generator →