#183C5F#183C5F

#183C5F is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.9% C 0.074 H 250.2°. Best body text is #FFFFFF at 11.35:1 contrast (WCAG AA passes).

Color values

HEX	#183C5F
RGB	rgb(24, 60, 95)
HSL	hsl(210, 60%, 23%)
HSV	hsv(210, 75%, 37%)
CMYK	cmyk(74.7%, 36.8%, 0%, 62.7%)
CIE-LAB	lab(24.49, 0.23, -24.54)
CIE-LCH	lch(24.49, 24.55, 270.54°)
OKLab	oklab(34.86% -0.025 -0.0697)
OKLCH	oklch(34.86% 0.074 250.2)
XYZ	xyz(4.0573, 4.2517, 11.4311)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C5F #5F3B18

analogous

#185F5E #183C5F #18195F

triadic

#183C5F #5F183C #3C5F18

tetradic

#183C5F #5E185F #5F3B18 #195F18

square

#183C5F #5E185F #5F3B18 #195F18

split-complementary

#183C5F #5F1819 #5F5E18

monochromatic

#060F18 #0C1D2E #183C5F #245B90 #317AC1

Accessibility & contrast

On white

11.35

#183C5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183C5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C5F

11.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C5F	#FFFFFF	#000000	##FFFFFF
##183C5F	1.00	11.35	1.85	11.35
#FFFFFF	11.35	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3E60

Deuteranopia (green-blind)

#22375E

Tritanopia (blue-blind)

#004449

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183c5f;
/* rgb */ color: rgb(24, 60, 95);
/* oklch */ color: oklch(34.9% 0.074 250.2);

Tailwind

colors: {
  custom: {
    50: '#5f718c',
    500: '#183c5f',
    950: '#000000',
  },
}

SCSS

$custom: #183c5f;
$custom-light: #5f718c;
$custom-dark: #000000;

JSON

{
  "hex": "#183c5f",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 95
  },
  "hsl": {
    "h": 209.577,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34856,
    "c": 0.07402,
    "h": 250.2
  },
  "luminance": 0.04252
}

Semantic roles & 50–950 ramp

primary

#183C5F

secondary

#95693D

accent

#9345E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183C5F

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

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