#18173A#18173A

#18173A is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.8% C 0.066 H 281.1°. Best body text is #FFFFFF at 17.18:1 contrast (WCAG AA passes).

Color values

HEX	#18173A
RGB	rgb(24, 23, 58)
HSL	hsl(242, 43%, 16%)
HSV	hsv(242, 60%, 23%)
CMYK	cmyk(58.6%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(9.89, 12.29, -22.61)
CIE-LCH	lch(9.89, 25.74, 298.54°)
OKLab	oklab(22.81% 0.0127 -0.0645)
OKLCH	oklch(22.81% 0.066 281.1)
XYZ	xyz(1.4466, 1.1124, 4.1407)
Luminance	0.0111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18173A #393A17

analogous

#17273A #18173A #29173A

triadic

#18173A #3A1817 #173A18

tetradic

#18173A #3A1727 #393A17 #173A29

square

#18173A #3A1727 #393A17 #173A29

split-complementary

#18173A #3A2917 #273A17

monochromatic

#090916 #090916 #18173A #2A2866 #3C3A92

Accessibility & contrast

On white

17.18

#18173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#18173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18173A

17.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18173A	#FFFFFF	#000000	##FFFFFF
##18173A	1.00	17.18	1.22	17.18
#FFFFFF	17.18	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#061D3B

Deuteranopia (green-blind)

#041A39

Tritanopia (blue-blind)

#0B1F25

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #18173a;
/* rgb */ color: rgb(24, 23, 58);
/* oklch */ color: oklch(22.8% 0.066 281.1);

Tailwind

colors: {
  custom: {
    50: '#585370',
    500: '#18173a',
    950: '#000000',
  },
}

SCSS

$custom: #18173a;
$custom-light: #585370;
$custom-dark: #000000;

JSON

{
  "hex": "#18173a",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 241.714,
    "s": 43.21,
    "l": 15.882
  },
  "oklch": {
    "l": 0.22813,
    "c": 0.06573,
    "h": 281.1
  },
  "luminance": 0.01112
}

Semantic roles & 50–950 ramp

primary

#18173A

secondary

#6F713C

accent

#D355CF

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #18173A

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

Preview Lab → · Contrast checker → · Palette generator →