#183F75#183F75

#183F75 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 37.1% C 0.103 H 257.4°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#183F75
RGB	rgb(24, 63, 117)
HSL	hsl(215, 66%, 28%)
HSV	hsv(215, 79%, 46%)
CMYK	cmyk(79.5%, 46.2%, 0%, 54.1%)
CIE-LAB	lab(26.83, 7.18, -34.93)
CIE-LCH	lch(26.83, 35.66, 281.62°)
OKLab	oklab(37.13% -0.0224 -0.1001)
OKLCH	oklch(37.13% 0.103 257.4)
XYZ	xyz(5.3639, 5.0329, 17.5149)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F75 #754E18

analogous

#186D75 #183F75 #201875

triadic

#183F75 #75183F #3F7518

tetradic

#183F75 #75186D #754E18 #187520

square

#183F75 #75186D #754E18 #187520

split-complementary

#183F75 #752018 #6D7518

monochromatic

#050E19 #0E2442 #183F75 #225AA8 #3277D5

Accessibility & contrast

On white

10.46

#183F75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183F75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F75

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F75	#FFFFFF	#000000	##FFFFFF
##183F75	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244477

Deuteranopia (green-blind)

#113B74

Tritanopia (blue-blind)

#004C54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f75;
/* rgb */ color: rgb(24, 63, 117);
/* oklch */ color: oklch(37.1% 0.103 257.4);

Tailwind

colors: {
  custom: {
    50: '#64739d',
    500: '#183f75',
    950: '#000000',
  },
}

SCSS

$custom: #183f75;
$custom-light: #64739d;
$custom-dark: #000000;

JSON

{
  "hex": "#183f75",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 117
  },
  "hsl": {
    "h": 214.839,
    "s": 65.957,
    "l": 27.647
  },
  "oklch": {
    "l": 0.37125,
    "c": 0.10254,
    "h": 257.4
  },
  "luminance": 0.05034
}

Semantic roles & 50–950 ramp

primary

#183F75

secondary

#AA7D3F

accent

#A23FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F75

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

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