#18303D#18303D

#18303D is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.6% C 0.038 H 233.8°. Best body text is #FFFFFF at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#18303D
RGB	rgb(24, 48, 61)
HSL	hsl(201, 44%, 17%)
HSV	hsv(201, 61%, 24%)
CMYK	cmyk(60.7%, 21.3%, 0%, 76.1%)
CIE-LAB	lab(18.56, -4.86, -11.09)
CIE-LCH	lch(18.56, 12.11, 246.32°)
OKLab	oklab(29.59% -0.0226 -0.0308)
OKLCH	oklch(29.59% 0.038 233.8)
XYZ	xyz(2.2756, 2.6448, 4.8046)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18303D #3D2518

analogous

#183D38 #18303D #181E3D

triadic

#18303D #3D1830 #303D18

tetradic

#18303D #38183D #3D2518 #1E3D18

square

#18303D #38183D #3D2518 #1E3D18

split-complementary

#18303D #3D181E #3D3818

monochromatic

#091116 #091116 #18303D #295369 #3B7595

Accessibility & contrast

On white

13.73

#18303D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#18303D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18303D

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18303D	#FFFFFF	#000000	##FFFFFF
##18303D	1.00	13.73	1.53	13.73
#FFFFFF	13.73	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2F3E

Deuteranopia (green-blind)

#252B3D

Tritanopia (blue-blind)

#033334

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #18303d;
/* rgb */ color: rgb(24, 48, 61);
/* oklch */ color: oklch(29.6% 0.038 233.8);

Tailwind

colors: {
  custom: {
    50: '#586872',
    500: '#18303d',
    950: '#000000',
  },
}

SCSS

$custom: #18303d;
$custom-light: #586872;
$custom-dark: #000000;

JSON

{
  "hex": "#18303d",
  "rgb": {
    "r": 24,
    "g": 48,
    "b": 61
  },
  "hsl": {
    "h": 201.081,
    "s": 43.529,
    "l": 16.667
  },
  "oklch": {
    "l": 0.29589,
    "c": 0.03824,
    "h": 233.8
  },
  "luminance": 0.02645
}

Semantic roles & 50–950 ramp

primary

#18303D

secondary

#73503D

accent

#8155D3

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030608

muted

#787A7B

Preview Lab

Preview with #18303D

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

Preview Lab → · Contrast checker → · Palette generator →