#183F69#183F69

#183F69 is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.3% C 0.085 H 252.7°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#183F69
RGB	rgb(24, 63, 105)
HSL	hsl(211, 63%, 25%)
HSV	hsv(211, 77%, 41%)
CMYK	cmyk(77.1%, 40%, 0%, 58.8%)
CIE-LAB	lab(26.07, 2.25, -28.50)
CIE-LCH	lch(26.07, 28.59, 274.51°)
OKLab	oklab(36.28% -0.0253 -0.0812)
OKLCH	oklch(36.28% 0.085 252.7)
XYZ	xyz(4.7030, 4.7686, 14.0344)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F69 #694218

analogous

#186769 #183F69 #191869

triadic

#183F69 #69183F #3F6918

tetradic

#183F69 #691867 #694218 #186919

square

#183F69 #691867 #694218 #186919

split-complementary

#183F69 #691918 #676918

monochromatic

#060F19 #0D2137 #183F69 #235D9B #2F7BCD

Accessibility & contrast

On white

10.75

#183F69 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183F69 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F69

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F69	#FFFFFF	#000000	##FFFFFF
##183F69	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C426B

Deuteranopia (green-blind)

#1F3A68

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183f69;
/* rgb */ color: rgb(24, 63, 105);
/* oklch */ color: oklch(36.3% 0.085 252.7);

Tailwind

colors: {
  custom: {
    50: '#617394',
    500: '#183f69',
    950: '#000000',
  },
}

SCSS

$custom: #183f69;
$custom-light: #617394;
$custom-dark: #000000;

JSON

{
  "hex": "#183f69",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 105
  },
  "hsl": {
    "h": 211.111,
    "s": 62.791,
    "l": 25.294
  },
  "oklch": {
    "l": 0.36284,
    "c": 0.08505,
    "h": 252.7
  },
  "luminance": 0.04769
}

Semantic roles & 50–950 ramp

primary

#183F69

secondary

#9F703E

accent

#9742E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05080D

muted

#7A7B7E

Preview Lab

Preview with #183F69

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

Preview Lab → · Contrast checker → · Palette generator →