#183C4A#183C4A

#183C4A is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.6% C 0.048 H 226.4°. Best body text is #FFFFFF at 11.77:1 contrast (WCAG AA passes).

Color values

HEX	#183C4A
RGB	rgb(24, 60, 74)
HSL	hsl(197, 51%, 19%)
HSV	hsv(197, 68%, 29%)
CMYK	cmyk(67.6%, 18.9%, 0%, 71%)
CIE-LAB	lab(23.41, -7.93, -12.42)
CIE-LCH	lch(23.41, 14.74, 237.46°)
OKLab	oklab(33.64% -0.033 -0.0346)
OKLCH	oklch(33.64% 0.048 226.4)
XYZ	xyz(3.2281, 3.9200, 7.0638)
Luminance	0.0392 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C4A #4A2618

analogous

#184A3F #183C4A #18234A

triadic

#183C4A #4A183C #3C4A18

tetradic

#183C4A #3F184A #4A2618 #234A18

square

#183C4A #3F184A #4A2618 #234A18

split-complementary

#183C4A #4A1823 #4A3F18

monochromatic

#071317 #09171C #183C4A #276178 #3687A6

Accessibility & contrast

On white

11.77

#183C4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#183C4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C4A

11.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C4A	#FFFFFF	#000000	##FFFFFF
##183C4A	1.00	11.77	1.78	11.77
#FFFFFF	11.77	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343B4B

Deuteranopia (green-blind)

#2D354A

Tritanopia (blue-blind)

#004041

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c4a;
/* rgb */ color: rgb(24, 60, 74);
/* oklch */ color: oklch(33.6% 0.048 226.4);

Tailwind

colors: {
  custom: {
    50: '#5b717c',
    500: '#183c4a',
    950: '#000000',
  },
}

SCSS

$custom: #183c4a;
$custom-light: #5b717c;
$custom-dark: #000000;

JSON

{
  "hex": "#183c4a",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 74
  },
  "hsl": {
    "h": 196.8,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.33644,
    "c": 0.04782,
    "h": 226.4
  },
  "luminance": 0.0392
}

Semantic roles & 50–950 ramp

primary

#183C4A

secondary

#81503D

accent

#754DDA

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040709

muted

#797A7B

Preview Lab

Preview with #183C4A

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

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