#18333B#18333B

#18333B is a dark, muted cyan. Relative luminance 0.029; OKLCH L 30.3% C 0.036 H 219.3°. Best body text is #FFFFFF at 13.33:1 contrast (WCAG AA passes).

Color values

HEX	#18333B
RGB	rgb(24, 51, 59)
HSL	hsl(194, 42%, 16%)
HSV	hsv(194, 59%, 23%)
CMYK	cmyk(59.3%, 13.6%, 0%, 76.9%)
CIE-LAB	lab(19.55, -7.56, -8.21)
CIE-LCH	lch(19.55, 11.16, 227.35°)
OKLab	oklab(30.34% -0.0278 -0.0227)
OKLCH	oklch(30.34% 0.036 219.3)
XYZ	xyz(2.3496, 2.8774, 4.5684)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18333B #3B2018

analogous

#183B32 #18333B #18223B

triadic

#18333B #3B1833 #333B18

tetradic

#18333B #32183B #3B2018 #223B18

square

#18333B #32183B #3B2018 #223B18

split-complementary

#18333B #3B1822 #3B3218

monochromatic

#091316 #091316 #18333B #2A5967 #3B7E92

Accessibility & contrast

On white

13.33

#18333B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#18333B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18333B

13.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18333B	#FFFFFF	#000000	##FFFFFF
##18333B	1.00	13.33	1.58	13.33
#FFFFFF	13.33	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E323B

Deuteranopia (green-blind)

#292E3B

Tritanopia (blue-blind)

#043635

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #18333b;
/* rgb */ color: rgb(24, 51, 59);
/* oklch */ color: oklch(30.3% 0.036 219.3);

Tailwind

colors: {
  custom: {
    50: '#586a70',
    500: '#18333b',
    950: '#000000',
  },
}

SCSS

$custom: #18333b;
$custom-light: #586a70;
$custom-dark: #000000;

JSON

{
  "hex": "#18333b",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 59
  },
  "hsl": {
    "h": 193.714,
    "s": 42.169,
    "l": 16.275
  },
  "oklch": {
    "l": 0.30344,
    "c": 0.03588,
    "h": 219.3
  },
  "luminance": 0.02878
}

Semantic roles & 50–950 ramp

primary

#18333B

secondary

#71493E

accent

#7256D2

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030607

muted

#787A7A

Preview Lab

Preview with #18333B

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

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