#183B5F#183B5F

#183B5F is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.6% C 0.075 H 251.4°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#183B5F
RGB	rgb(24, 59, 95)
HSL	hsl(210, 60%, 23%)
HSV	hsv(210, 75%, 37%)
CMYK	cmyk(74.7%, 37.9%, 0%, 62.7%)
CIE-LAB	lab(24.15, 0.92, -25.07)
CIE-LCH	lch(24.15, 25.09, 272.09°)
OKLab	oklab(34.6% -0.0239 -0.0712)
OKLCH	oklch(34.6% 0.075 251.4)
XYZ	xyz(4.0054, 4.1479, 11.4138)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B5F #5F3C18

analogous

#185E5F #183B5F #19185F

triadic

#183B5F #5F183B #3B5F18

tetradic

#183B5F #5F185E #5F3C18 #185F19

square

#183B5F #5F185E #5F3C18 #185F19

split-complementary

#183B5F #5F1918 #5E5F18

monochromatic

#060F18 #0C1D2E #183B5F #245990 #3178C1

Accessibility & contrast

On white

11.48

#183B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B5F

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B5F	#FFFFFF	#000000	##FFFFFF
##183B5F	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3D60

Deuteranopia (green-blind)

#21365E

Tritanopia (blue-blind)

#004348

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183b5f;
/* rgb */ color: rgb(24, 59, 95);
/* oklch */ color: oklch(34.6% 0.075 251.4);

Tailwind

colors: {
  custom: {
    50: '#5f708c',
    500: '#183b5f',
    950: '#000000',
  },
}

SCSS

$custom: #183b5f;
$custom-light: #5f708c;
$custom-dark: #000000;

JSON

{
  "hex": "#183b5f",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 95
  },
  "hsl": {
    "h": 210.423,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34595,
    "c": 0.07512,
    "h": 251.4
  },
  "luminance": 0.04148
}

Semantic roles & 50–950 ramp

primary

#183B5F

secondary

#956A3D

accent

#9545E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183B5F

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

Preview Lab → · Contrast checker → · Palette generator →