#183D66#183D66

#183D66 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.6% C 0.083 H 253.2°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#183D66
RGB	rgb(24, 61, 102)
HSL	hsl(212, 62%, 25%)
HSV	hsv(212, 76%, 40%)
CMYK	cmyk(76.5%, 40.2%, 0%, 60%)
CIE-LAB	lab(25.23, 2.39, -27.90)
CIE-LCH	lch(25.23, 28.00, 274.90°)
OKLab	oklab(35.57% -0.0241 -0.0795)
OKLCH	oklch(35.57% 0.083 253.2)
XYZ	xyz(4.4428, 4.4905, 13.2004)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D66 #664118

analogous

#186466 #183D66 #1A1866

triadic

#183D66 #66183D #3D6618

tetradic

#183D66 #661864 #664118 #18661A

square

#183D66 #661864 #664118 #18661A

split-complementary

#183D66 #661A18 #646618

monochromatic

#060F19 #0C1F34 #183D66 #245B98 #2F78C9

Accessibility & contrast

On white

11.06

#183D66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#183D66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D66

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D66	#FFFFFF	#000000	##FFFFFF
##183D66	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4068

Deuteranopia (green-blind)

#1E3965

Tritanopia (blue-blind)

#00474C

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183d66;
/* rgb */ color: rgb(24, 61, 102);
/* oklch */ color: oklch(35.6% 0.083 253.2);

Tailwind

colors: {
  custom: {
    50: '#607292',
    500: '#183d66',
    950: '#000000',
  },
}

SCSS

$custom: #183d66;
$custom-light: #607292;
$custom-dark: #000000;

JSON

{
  "hex": "#183d66",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 102
  },
  "hsl": {
    "h": 211.538,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35574,
    "c": 0.08302,
    "h": 253.2
  },
  "luminance": 0.04491
}

Semantic roles & 50–950 ramp

primary

#183D66

secondary

#9C6F3E

accent

#9843E5

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #183D66

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

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