#183B6F#183B6F

#183B6F is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.7% C 0.099 H 258.4°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#183B6F
RGB	rgb(24, 59, 111)
HSL	hsl(216, 64%, 26%)
HSV	hsv(216, 78%, 44%)
CMYK	cmyk(78.4%, 46.8%, 0%, 56.5%)
CIE-LAB	lab(25.17, 7.49, -33.78)
CIE-LCH	lch(25.17, 34.60, 282.50°)
OKLab	oklab(35.71% -0.0199 -0.0968)
OKLCH	oklch(35.71% 0.099 258.4)
XYZ	xyz(4.8088, 4.4693, 15.6451)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B6F #6F4C18

analogous

#18676F #183B6F #21186F

triadic

#183B6F #6F183B #3B6F18

tetradic

#183B6F #6F1867 #6F4C18 #186F21

square

#183B6F #6F1867 #6F4C18 #186F21

split-complementary

#183B6F #6F2118 #676F18

monochromatic

#050D19 #0D203D #183B6F #2356A1 #2F71D2

Accessibility & contrast

On white

11.09

#183B6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183B6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B6F

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B6F	#FFFFFF	#000000	##FFFFFF
##183B6F	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214071

Deuteranopia (green-blind)

#0F386E

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183b6f;
/* rgb */ color: rgb(24, 59, 111);
/* oklch */ color: oklch(35.7% 0.099 258.4);

Tailwind

colors: {
  custom: {
    50: '#627099',
    500: '#183b6f',
    950: '#000000',
  },
}

SCSS

$custom: #183b6f;
$custom-light: #627099;
$custom-dark: #000000;

JSON

{
  "hex": "#183b6f",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 111
  },
  "hsl": {
    "h": 215.862,
    "s": 64.444,
    "l": 26.471
  },
  "oklch": {
    "l": 0.3571,
    "c": 0.09878,
    "h": 258.4
  },
  "luminance": 0.0447
}

Semantic roles & 50–950 ramp

primary

#183B6F

secondary

#A57B3E

accent

#A440E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B6F

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

Preview Lab → · Contrast checker → · Palette generator →