#183F6E#183F6E

#183F6E is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.6% C 0.092 H 254.9°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#183F6E
RGB	rgb(24, 63, 110)
HSL	hsl(213, 64%, 26%)
HSV	hsv(213, 78%, 43%)
CMYK	cmyk(78.2%, 42.7%, 0%, 56.9%)
CIE-LAB	lab(26.37, 4.30, -31.21)
CIE-LCH	lch(26.37, 31.50, 277.84°)
OKLab	oklab(36.63% -0.024 -0.0891)
OKLCH	oklch(36.63% 0.092 254.9)
XYZ	xyz(4.9676, 4.8744, 15.4279)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F6E #6E4718

analogous

#186A6E #183F6E #1C186E

triadic

#183F6E #6E183F #3F6E18

tetradic

#183F6E #6E186A #6E4718 #186E1C

square

#183F6E #6E186A #6E4718 #186E1C

split-complementary

#183F6E #6E1C18 #6A6E18

monochromatic

#050E19 #0D223C #183F6E #235CA0 #2F79D2

Accessibility & contrast

On white

10.63

#183F6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183F6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F6E

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F6E	#FFFFFF	#000000	##FFFFFF
##183F6E	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294370

Deuteranopia (green-blind)

#1A3B6D

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183f6e;
/* rgb */ color: rgb(24, 63, 110);
/* oklch */ color: oklch(36.6% 0.092 254.9);

Tailwind

colors: {
  custom: {
    50: '#627398',
    500: '#183f6e',
    950: '#000000',
  },
}

SCSS

$custom: #183f6e;
$custom-light: #627398;
$custom-dark: #000000;

JSON

{
  "hex": "#183f6e",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 110
  },
  "hsl": {
    "h": 212.791,
    "s": 64.179,
    "l": 26.275
  },
  "oklch": {
    "l": 0.36626,
    "c": 0.09231,
    "h": 254.9
  },
  "luminance": 0.04875
}

Semantic roles & 50–950 ramp

primary

#183F6E

secondary

#A4763E

accent

#9C41E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #183F6E

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

Preview Lab → · Contrast checker → · Palette generator →