#183E5E#183E5E

#183E5E is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.3% C 0.071 H 247.0°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#183E5E
RGB	rgb(24, 62, 94)
HSL	hsl(207, 59%, 23%)
HSV	hsv(207, 74%, 37%)
CMYK	cmyk(74.5%, 34%, 0%, 63.1%)
CIE-LAB	lab(25.10, -1.52, -22.93)
CIE-LCH	lch(25.10, 22.98, 266.21°)
OKLab	oklab(35.32% -0.0276 -0.0649)
OKLCH	oklch(35.32% 0.071 247)
XYZ	xyz(4.1189, 4.4471, 11.2288)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E5E #5E3818

analogous

#185E5B #183E5E #181B5E

triadic

#183E5E #5E183E #3E5E18

tetradic

#183E5E #5B185E #5E3818 #1B5E18

square

#183E5E #5B185E #5E3818 #1B5E18

split-complementary

#183E5E #5E181B #5E5B18

monochromatic

#061018 #0C1E2D #183E5E #245E8F #317EC0

Accessibility & contrast

On white

11.11

#183E5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183E5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E5E

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E5E	#FFFFFF	#000000	##FFFFFF
##183E5E	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303F5F

Deuteranopia (green-blind)

#26395D

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183e5e;
/* rgb */ color: rgb(24, 62, 94);
/* oklch */ color: oklch(35.3% 0.071 247.0);

Tailwind

colors: {
  custom: {
    50: '#5f738c',
    500: '#183e5e',
    950: '#000000',
  },
}

SCSS

$custom: #183e5e;
$custom-light: #5f738c;
$custom-dark: #000000;

JSON

{
  "hex": "#183e5e",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 94
  },
  "hsl": {
    "h": 207.429,
    "s": 59.322,
    "l": 23.137
  },
  "oklch": {
    "l": 0.35318,
    "c": 0.07055,
    "h": 247
  },
  "luminance": 0.04448
}

Semantic roles & 50–950 ramp

primary

#183E5E

secondary

#94653D

accent

#8D45E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183E5E

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

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