#18183A#18183A

#18183A is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.0% C 0.064 H 280.1°. Best body text is #FFFFFF at 17.06:1 contrast (WCAG AA passes).

Color values

HEX	#18183A
RGB	rgb(24, 24, 58)
HSL	hsl(240, 41%, 16%)
HSV	hsv(240, 59%, 23%)
CMYK	cmyk(58.6%, 58.6%, 0%, 77.3%)
CIE-LAB	lab(10.21, 11.53, -22.11)
CIE-LCH	lch(10.21, 24.94, 297.54°)
OKLab	oklab(23.05% 0.0113 -0.063)
OKLCH	oklch(23.05% 0.064 280.1)
XYZ	xyz(1.4668, 1.1529, 4.1474)
Luminance	0.0115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18183A #3A3A18

analogous

#18293A #18183A #29183A

triadic

#18183A #3A1818 #183A18

tetradic

#18183A #3A1829 #3A3A18 #183A29

square

#18183A #3A1829 #3A3A18 #183A29

split-complementary

#18183A #3A2918 #293A18

monochromatic

#090916 #090916 #18183A #2A2A65 #3C3C91

Accessibility & contrast

On white

17.06

#18183A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#18183A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18183A

17.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18183A	#FFFFFF	#000000	##FFFFFF
##18183A	1.00	17.06	1.23	17.06
#FFFFFF	17.06	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#081D3B

Deuteranopia (green-blind)

#051B39

Tritanopia (blue-blind)

#0B1F26

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #18183a;
/* rgb */ color: rgb(24, 24, 58);
/* oklch */ color: oklch(23.0% 0.064 280.1);

Tailwind

colors: {
  custom: {
    50: '#585470',
    500: '#18183a',
    950: '#000000',
  },
}

SCSS

$custom: #18183a;
$custom-light: #585470;
$custom-dark: #000000;

JSON

{
  "hex": "#18183a",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 58
  },
  "hsl": {
    "h": 240,
    "s": 41.463,
    "l": 16.078
  },
  "oklch": {
    "l": 0.23046,
    "c": 0.06402,
    "h": 280.1
  },
  "luminance": 0.01153
}

Semantic roles & 50–950 ramp

primary

#18183A

secondary

#70703E

accent

#D157D1

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #18183A

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

Preview Lab → · Contrast checker → · Palette generator →