#183F74#183F74

#183F74 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 37.1% C 0.101 H 257.1°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#183F74
RGB	rgb(24, 63, 116)
HSL	hsl(215, 66%, 27%)
HSV	hsv(215, 79%, 45%)
CMYK	cmyk(79.3%, 45.7%, 0%, 54.5%)
CIE-LAB	lab(26.76, 6.77, -34.40)
CIE-LCH	lch(26.76, 35.06, 281.13°)
OKLab	oklab(37.05% -0.0226 -0.0985)
OKLCH	oklch(37.05% 0.101 257.1)
XYZ	xyz(5.3054, 5.0096, 17.2069)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F74 #744D18

analogous

#186D74 #183F74 #1F1874

triadic

#183F74 #74183F #3F7418

tetradic

#183F74 #74186D #744D18 #18741F

square

#183F74 #74186D #744D18 #18741F

split-complementary

#183F74 #741F18 #6D7418

monochromatic

#050E19 #0E2341 #183F74 #225BA7 #3277D5

Accessibility & contrast

On white

10.49

#183F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F74

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F74	#FFFFFF	#000000	##FFFFFF
##183F74	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244476

Deuteranopia (green-blind)

#133B73

Tritanopia (blue-blind)

#004C53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f74;
/* rgb */ color: rgb(24, 63, 116);
/* oklch */ color: oklch(37.1% 0.101 257.1);

Tailwind

colors: {
  custom: {
    50: '#64739c',
    500: '#183f74',
    950: '#000000',
  },
}

SCSS

$custom: #183f74;
$custom-light: #64739c;
$custom-dark: #000000;

JSON

{
  "hex": "#183f74",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 116
  },
  "hsl": {
    "h": 214.565,
    "s": 65.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.37053,
    "c": 0.10107,
    "h": 257.1
  },
  "luminance": 0.0501
}

Semantic roles & 50–950 ramp

primary

#183F74

secondary

#A97C3F

accent

#A13FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F74

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

Preview Lab → · Contrast checker → · Palette generator →