#18173F#18173F

#18173F is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.2% C 0.074 H 280.1°. Best body text is #FFFFFF at 17.03:1 contrast (WCAG AA passes).

Color values

HEX	#18173F
RGB	rgb(24, 23, 63)
HSL	hsl(242, 47%, 17%)
HSV	hsv(242, 63%, 25%)
CMYK	cmyk(61.9%, 63.5%, 0%, 75.3%)
CIE-LAB	lab(10.30, 14.23, -25.51)
CIE-LCH	lch(10.30, 29.22, 299.16°)
OKLab	oklab(23.25% 0.013 -0.073)
OKLCH	oklch(23.25% 0.074 280.1)
XYZ	xyz(1.5800, 1.1658, 4.8434)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18173F #3E3F17

analogous

#172A3F #18173F #2C173F

triadic

#18173F #3F1817 #173F18

tetradic

#18173F #3F172A #3E3F17 #173F2C

square

#18173F #3F172A #3E3F17 #173F2C

split-complementary

#18173F #3F2C17 #2A3F17

monochromatic

#090816 #090816 #18173F #29276C #3A3899

Accessibility & contrast

On white

17.03

#18173F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#18173F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18173F

17.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18173F	#FFFFFF	#000000	##FFFFFF
##18173F	1.00	17.03	1.23	17.03
#FFFFFF	17.03	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011E40

Deuteranopia (green-blind)

#001B3E

Tritanopia (blue-blind)

#062028

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #18173f;
/* rgb */ color: rgb(24, 23, 63);
/* oklch */ color: oklch(23.2% 0.074 280.1);

Tailwind

colors: {
  custom: {
    50: '#595374',
    500: '#18173f',
    950: '#000000',
  },
}

SCSS

$custom: #18173f;
$custom-light: #595374;
$custom-dark: #000000;

JSON

{
  "hex": "#18173f",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 63
  },
  "hsl": {
    "h": 241.5,
    "s": 46.512,
    "l": 16.863
  },
  "oklch": {
    "l": 0.23247,
    "c": 0.07418,
    "h": 280.1
  },
  "luminance": 0.01166
}

Semantic roles & 50–950 ramp

primary

#18173F

secondary

#74763C

accent

#D652D3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #18173F

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

Preview Lab → · Contrast checker → · Palette generator →