#183A53#183A53

#183A53 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.6% C 0.059 H 243.1°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#183A53
RGB	rgb(24, 58, 83)
HSL	hsl(205, 55%, 21%)
HSV	hsv(205, 71%, 33%)
CMYK	cmyk(71.1%, 30.1%, 0%, 67.5%)
CIE-LAB	lab(23.15, -3.19, -18.78)
CIE-LCH	lch(23.15, 19.05, 260.35°)
OKLab	oklab(33.59% -0.0268 -0.0529)
OKLCH	oklch(33.59% 0.059 243.1)
XYZ	xyz(3.4505, 3.8445, 8.7422)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A53 #533118

analogous

#18534E #183A53 #181C53

triadic

#183A53 #53183A #3A5318

tetradic

#183A53 #4E1853 #533118 #1C5318

square

#183A53 #4E1853 #533118 #1C5318

split-complementary

#183A53 #53181C #534E18

monochromatic

#071118 #0A1924 #183A53 #265B82 #337CB2

Accessibility & contrast

On white

11.87

#183A53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#183A53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A53

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A53	#FFFFFF	#000000	##FFFFFF
##183A53	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3A54

Deuteranopia (green-blind)

#273553

Tritanopia (blue-blind)

#004043

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183a53;
/* rgb */ color: rgb(24, 58, 83);
/* oklch */ color: oklch(33.6% 0.059 243.1);

Tailwind

colors: {
  custom: {
    50: '#5c7083',
    500: '#183a53',
    950: '#000000',
  },
}

SCSS

$custom: #183a53;
$custom-light: #5c7083;
$custom-dark: #000000;

JSON

{
  "hex": "#183a53",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 83
  },
  "hsl": {
    "h": 205.424,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.33586,
    "c": 0.05931,
    "h": 243.1
  },
  "luminance": 0.03845
}

Semantic roles & 50–950 ramp

primary

#183A53

secondary

#8A5E3D

accent

#8949DE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183A53

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

Preview Lab → · Contrast checker → · Palette generator →