#183F6F#183F6F

#183F6F is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.7% C 0.094 H 255.3°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#183F6F
RGB	rgb(24, 63, 111)
HSL	hsl(213, 64%, 26%)
HSV	hsv(213, 78%, 44%)
CMYK	cmyk(78.4%, 43.2%, 0%, 56.5%)
CIE-LAB	lab(26.44, 4.71, -31.74)
CIE-LCH	lch(26.44, 32.09, 278.43°)
OKLab	oklab(36.7% -0.0238 -0.0907)
OKLCH	oklch(36.7% 0.094 255.3)
XYZ	xyz(5.0224, 4.8963, 15.7162)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F6F #6F4818

analogous

#186B6F #183F6F #1D186F

triadic

#183F6F #6F183F #3F6F18

tetradic

#183F6F #6F186B #6F4818 #186F1D

square

#183F6F #6F186B #6F4818 #186F1D

split-complementary

#183F6F #6F1D18 #6B6F18

monochromatic

#050E19 #0D223D #183F6F #235CA1 #2F78D2

Accessibility & contrast

On white

10.61

#183F6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183F6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F6F

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F6F	#FFFFFF	#000000	##FFFFFF
##183F6F	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284371

Deuteranopia (green-blind)

#193B6E

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f6f;
/* rgb */ color: rgb(24, 63, 111);
/* oklch */ color: oklch(36.7% 0.094 255.3);

Tailwind

colors: {
  custom: {
    50: '#627398',
    500: '#183f6f',
    950: '#000000',
  },
}

SCSS

$custom: #183f6f;
$custom-light: #627398;
$custom-dark: #000000;

JSON

{
  "hex": "#183f6f",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 111
  },
  "hsl": {
    "h": 213.103,
    "s": 64.444,
    "l": 26.471
  },
  "oklch": {
    "l": 0.36696,
    "c": 0.09376,
    "h": 255.3
  },
  "luminance": 0.04897
}

Semantic roles & 50–950 ramp

primary

#183F6F

secondary

#A5773E

accent

#9D40E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F6F

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

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