#183C58#183C58

#183C58 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.064 H 244.8°. Best body text is #FFFFFF at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#183C58
RGB	rgb(24, 60, 88)
HSL	hsl(206, 57%, 22%)
HSV	hsv(206, 73%, 35%)
CMYK	cmyk(72.7%, 31.8%, 0%, 65.5%)
CIE-LAB	lab(24.10, -2.57, -20.59)
CIE-LCH	lch(24.10, 20.75, 262.90°)
OKLab	oklab(34.42% -0.0274 -0.0581)
OKLCH	oklch(34.42% 0.064 244.8)
XYZ	xyz(3.7533, 4.1301, 9.8300)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C58 #583418

analogous

#185854 #183C58 #181C58

triadic

#183C58 #58183C #3C5818

tetradic

#183C58 #541858 #583418 #1C5818

square

#183C58 #541858 #583418 #1C5818

split-complementary

#183C58 #58181C #585418

monochromatic

#071018 #0B1B28 #183C58 #255D88 #327EB8

Accessibility & contrast

On white

11.50

#183C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C58

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C58	#FFFFFF	#000000	##FFFFFF
##183C58	1.00	11.50	1.83	11.50
#FFFFFF	11.50	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3D59

Deuteranopia (green-blind)

#273757

Tritanopia (blue-blind)

#004346

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183c58;
/* rgb */ color: rgb(24, 60, 88);
/* oklch */ color: oklch(34.4% 0.064 244.8);

Tailwind

colors: {
  custom: {
    50: '#5d7187',
    500: '#183c58',
    950: '#000000',
  },
}

SCSS

$custom: #183c58;
$custom-light: #5d7187;
$custom-dark: #000000;

JSON

{
  "hex": "#183c58",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 88
  },
  "hsl": {
    "h": 206.25,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.34421,
    "c": 0.06426,
    "h": 244.8
  },
  "luminance": 0.0413
}

Semantic roles & 50–950 ramp

primary

#183C58

secondary

#8F613D

accent

#8A47E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183C58

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

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