#18183F#18183F

#18183F is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.5% C 0.073 H 279.2°. Best body text is #FFFFFF at 16.92:1 contrast (WCAG AA passes).

Color values

HEX	#18183F
RGB	rgb(24, 24, 63)
HSL	hsl(240, 45%, 17%)
HSV	hsv(240, 62%, 25%)
CMYK	cmyk(61.9%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(10.60, 13.48, -25.03)
CIE-LCH	lch(10.60, 28.43, 298.31°)
OKLab	oklab(23.47% 0.0117 -0.0716)
OKLCH	oklch(23.47% 0.073 279.2)
XYZ	xyz(1.6002, 1.2062, 4.8502)
Luminance	0.0121 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18183F #3F3F18

analogous

#182C3F #18183F #2C183F

triadic

#18183F #3F1818 #183F18

tetradic

#18183F #3F182C #3F3F18 #183F2C

square

#18183F #3F182C #3F3F18 #183F2C

split-complementary

#18183F #3F2C18 #2C3F18

monochromatic

#080816 #080816 #18183F #29296B #3A3A98

Accessibility & contrast

On white

16.92

#18183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#18183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18183F

16.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18183F	#FFFFFF	#000000	##FFFFFF
##18183F	1.00	16.92	1.24	16.92
#FFFFFF	16.92	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031E40

Deuteranopia (green-blind)

#001B3E

Tritanopia (blue-blind)

#062128

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #18183f;
/* rgb */ color: rgb(24, 24, 63);
/* oklch */ color: oklch(23.5% 0.073 279.2);

Tailwind

colors: {
  custom: {
    50: '#595474',
    500: '#18183f',
    950: '#000000',
  },
}

SCSS

$custom: #18183f;
$custom-light: #595474;
$custom-dark: #000000;

JSON

{
  "hex": "#18183f",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 240,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.23472,
    "c": 0.07254,
    "h": 279.2
  },
  "luminance": 0.01206
}

Semantic roles & 50–950 ramp

primary

#18183F

secondary

#75753D

accent

#D553D5

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #18183F

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

Preview Lab → · Contrast checker → · Palette generator →