#183E64#183E64

#183E64 is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.7% C 0.079 H 251.0°. Best body text is #FFFFFF at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#183E64
RGB	rgb(24, 62, 100)
HSL	hsl(210, 61%, 24%)
HSV	hsv(210, 76%, 39%)
CMYK	cmyk(76%, 38%, 0%, 60.8%)
CIE-LAB	lab(25.44, 0.89, -26.28)
CIE-LCH	lch(25.44, 26.29, 271.95°)
OKLab	oklab(35.7% -0.0257 -0.0747)
OKLCH	oklch(35.7% 0.079 251)
XYZ	xyz(4.3987, 4.5591, 12.7023)
Luminance	0.0456 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E64 #643E18

analogous

#186464 #183E64 #181864

triadic

#183E64 #64183E #3E6418

tetradic

#183E64 #641864 #643E18 #186418

square

#183E64 #641864 #643E18 #186418

split-complementary

#183E64 #641818 #646418

monochromatic

#060F19 #0C1F33 #183E64 #245D95 #307BC7

Accessibility & contrast

On white

10.98

#183E64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183E64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E64

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E64	#FFFFFF	#000000	##FFFFFF
##183E64	1.00	10.98	1.91	10.98
#FFFFFF	10.98	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4066

Deuteranopia (green-blind)

#223963

Tritanopia (blue-blind)

#00474C

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183e64;
/* rgb */ color: rgb(24, 62, 100);
/* oklch */ color: oklch(35.7% 0.079 251.0);

Tailwind

colors: {
  custom: {
    50: '#607290',
    500: '#183e64',
    950: '#000000',
  },
}

SCSS

$custom: #183e64;
$custom-light: #607290;
$custom-dark: #000000;

JSON

{
  "hex": "#183e64",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 100
  },
  "hsl": {
    "h": 210,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.35698,
    "c": 0.07899,
    "h": 251
  },
  "luminance": 0.0456
}

Semantic roles & 50–950 ramp

primary

#183E64

secondary

#9A6C3E

accent

#9443E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183E64

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

Preview Lab → · Contrast checker → · Palette generator →