#183E4E#183E4E

#183E4E is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.4% C 0.051 H 228.6°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX	#183E4E
RGB	rgb(24, 62, 78)
HSL	hsl(198, 53%, 20%)
HSV	hsv(198, 69%, 31%)
CMYK	cmyk(69.2%, 20.5%, 0%, 69.4%)
CIE-LAB	lab(24.29, -7.72, -13.72)
CIE-LCH	lch(24.29, 15.74, 240.63°)
OKLab	oklab(34.41% -0.0338 -0.0383)
OKLCH	oklch(34.41% 0.051 228.6)
XYZ	xyz(3.4739, 4.1891, 7.8318)
Luminance	0.0419 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4E #4E2818

analogous

#184E43 #183E4E #18234E

triadic

#183E4E #4E183E #3E4E18

tetradic

#183E4E #43184E #4E2818 #234E18

square

#183E4E #43184E #4E2818 #234E18

split-complementary

#183E4E #4E1823 #4E4318

monochromatic

#071317 #0A191F #183E4E #26637D #3588AC

Accessibility & contrast

On white

11.43

#183E4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183E4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4E

11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4E	#FFFFFF	#000000	##FFFFFF
##183E4E	1.00	11.43	1.84	11.43
#FFFFFF	11.43	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363D4F

Deuteranopia (green-blind)

#2E374E

Tritanopia (blue-blind)

#004343

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e4e;
/* rgb */ color: rgb(24, 62, 78);
/* oklch */ color: oklch(34.4% 0.051 228.6);

Tailwind

colors: {
  custom: {
    50: '#5c737f',
    500: '#183e4e',
    950: '#000000',
  },
}

SCSS

$custom: #183e4e;
$custom-light: #5c737f;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4e",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 78
  },
  "hsl": {
    "h": 197.778,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.34408,
    "c": 0.05106,
    "h": 228.6
  },
  "luminance": 0.04189
}

Semantic roles & 50–950 ramp

primary

#183E4E

secondary

#85523D

accent

#764BDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183E4E

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

Preview Lab → · Contrast checker → · Palette generator →