#183A5F#183A5F

#183A5F is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.3% C 0.076 H 252.6°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#183A5F
RGB	rgb(24, 58, 95)
HSL	hsl(211, 60%, 23%)
HSV	hsv(211, 75%, 37%)
CMYK	cmyk(74.7%, 38.9%, 0%, 62.7%)
CIE-LAB	lab(23.82, 1.60, -25.59)
CIE-LCH	lch(23.82, 25.64, 273.59°)
OKLab	oklab(34.34% -0.0228 -0.0728)
OKLCH	oklch(34.34% 0.076 252.6)
XYZ	xyz(3.9545, 4.0461, 11.3968)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A5F #5F3D18

analogous

#185D5F #183A5F #1A185F

triadic

#183A5F #5F183A #3A5F18

tetradic

#183A5F #5F185D #5F3D18 #185F1A

square

#183A5F #5F185D #5F3D18 #185F1A

split-complementary

#183A5F #5F1A18 #5D5F18

monochromatic

#060F18 #0C1C2E #183A5F #245890 #3176C1

Accessibility & contrast

On white

11.61

#183A5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183A5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A5F

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A5F	#FFFFFF	#000000	##FFFFFF
##183A5F	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293C61

Deuteranopia (green-blind)

#1F365E

Tritanopia (blue-blind)

#004348

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183a5f;
/* rgb */ color: rgb(24, 58, 95);
/* oklch */ color: oklch(34.3% 0.076 252.6);

Tailwind

colors: {
  custom: {
    50: '#5f6f8c',
    500: '#183a5f',
    950: '#000000',
  },
}

SCSS

$custom: #183a5f;
$custom-light: #5f6f8c;
$custom-dark: #000000;

JSON

{
  "hex": "#183a5f",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 95
  },
  "hsl": {
    "h": 211.268,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34336,
    "c": 0.07625,
    "h": 252.6
  },
  "luminance": 0.04047
}

Semantic roles & 50–950 ramp

primary

#183A5F

secondary

#956B3D

accent

#9745E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183A5F

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

Preview Lab → · Contrast checker → · Palette generator →