#183B61#183B61

#183B61 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.7% C 0.078 H 252.6°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX	#183B61
RGB	rgb(24, 59, 97)
HSL	hsl(211, 60%, 24%)
HSV	hsv(211, 75%, 38%)
CMYK	cmyk(75.3%, 39.2%, 0%, 62%)
CIE-LAB	lab(24.27, 1.73, -26.18)
CIE-LCH	lch(24.27, 26.24, 273.78°)
OKLab	oklab(34.73% -0.0233 -0.0745)
OKLCH	oklch(34.73% 0.078 252.6)
XYZ	xyz(4.0975, 4.1847, 11.8987)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B61 #613E18

analogous

#185F61 #183B61 #191861

triadic

#183B61 #61183B #3B6118

tetradic

#183B61 #61185F #613E18 #186119

square

#183B61 #61185F #613E18 #186119

split-complementary

#183B61 #611918 #5F6118

monochromatic

#060F19 #0C1D30 #183B61 #245992 #3077C3

Accessibility & contrast

On white

11.43

#183B61 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183B61 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B61

11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B61	#FFFFFF	#000000	##FFFFFF
##183B61	1.00	11.43	1.84	11.43
#FFFFFF	11.43	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3D63

Deuteranopia (green-blind)

#1F3760

Tritanopia (blue-blind)

#004449

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183b61;
/* rgb */ color: rgb(24, 59, 97);
/* oklch */ color: oklch(34.7% 0.078 252.6);

Tailwind

colors: {
  custom: {
    50: '#5f708e',
    500: '#183b61',
    950: '#000000',
  },
}

SCSS

$custom: #183b61;
$custom-light: #5f708e;
$custom-dark: #000000;

JSON

{
  "hex": "#183b61",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 97
  },
  "hsl": {
    "h": 211.233,
    "s": 60.331,
    "l": 23.725
  },
  "oklch": {
    "l": 0.34727,
    "c": 0.07804,
    "h": 252.6
  },
  "luminance": 0.04185
}

Semantic roles & 50–950 ramp

primary

#183B61

secondary

#976C3D

accent

#9744E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183B61

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

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