#183C50#183C50

#183C50 is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.054 H 235.8°. Best body text is #FFFFFF at 11.66:1 contrast (WCAG AA passes).

Color values

HEX	#183C50
RGB	rgb(24, 60, 80)
HSL	hsl(201, 54%, 20%)
HSV	hsv(201, 70%, 31%)
CMYK	cmyk(70%, 25%, 0%, 68.6%)
CIE-LAB	lab(23.69, -5.67, -15.96)
CIE-LCH	lch(23.69, 16.94, 250.43°)
OKLab	oklab(33.96% -0.0304 -0.0448)
OKLCH	oklch(33.96% 0.054 235.8)
XYZ	xyz(3.4400, 4.0047, 8.1796)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C50 #502C18

analogous

#185048 #183C50 #182050

triadic

#183C50 #50183C #3C5018

tetradic

#183C50 #481850 #502C18 #205018

square

#183C50 #481850 #502C18 #205018

split-complementary

#183C50 #501820 #504818

monochromatic

#071218 #0A1921 #183C50 #265F7F #3483AE

Accessibility & contrast

On white

11.66

#183C50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183C50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C50

11.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C50	#FFFFFF	#000000	##FFFFFF
##183C50	1.00	11.66	1.80	11.66
#FFFFFF	11.66	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333C51

Deuteranopia (green-blind)

#2B3650

Tritanopia (blue-blind)

#004143

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c50;
/* rgb */ color: rgb(24, 60, 80);
/* oklch */ color: oklch(34.0% 0.054 235.8);

Tailwind

colors: {
  custom: {
    50: '#5c7181',
    500: '#183c50',
    950: '#000000',
  },
}

SCSS

$custom: #183c50;
$custom-light: #5c7181;
$custom-dark: #000000;

JSON

{
  "hex": "#183c50",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 80
  },
  "hsl": {
    "h": 201.429,
    "s": 53.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.33962,
    "c": 0.05413,
    "h": 235.8
  },
  "luminance": 0.04005
}

Semantic roles & 50–950 ramp

primary

#183C50

secondary

#87573D

accent

#7F4BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C50

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

Preview Lab → · Contrast checker → · Palette generator →