#183A6F#183A6F

#183A6F is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.100 H 259.1°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#183A6F
RGB	rgb(24, 58, 111)
HSL	hsl(217, 64%, 26%)
HSV	hsv(217, 78%, 44%)
CMYK	cmyk(78.4%, 47.7%, 0%, 56.5%)
CIE-LAB	lab(24.85, 8.19, -34.28)
CIE-LCH	lch(24.85, 35.25, 283.44°)
OKLab	oklab(35.47% -0.0189 -0.0983)
OKLCH	oklch(35.47% 0.1 259.1)
XYZ	xyz(4.7579, 4.3675, 15.6281)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A6F #6F4D18

analogous

#18666F #183A6F #22186F

triadic

#183A6F #6F183A #3A6F18

tetradic

#183A6F #6F1866 #6F4D18 #186F22

square

#183A6F #6F1866 #6F4D18 #186F22

split-complementary

#183A6F #6F2218 #666F18

monochromatic

#050D19 #0D203D #183A6F #2354A1 #2F6FD2

Accessibility & contrast

On white

11.21

#183A6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183A6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A6F

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A6F	#FFFFFF	#000000	##FFFFFF
##183A6F	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3F71

Deuteranopia (green-blind)

#0C376E

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183a6f;
/* rgb */ color: rgb(24, 58, 111);
/* oklch */ color: oklch(35.5% 0.100 259.1);

Tailwind

colors: {
  custom: {
    50: '#626f99',
    500: '#183a6f',
    950: '#000000',
  },
}

SCSS

$custom: #183a6f;
$custom-light: #626f99;
$custom-dark: #000000;

JSON

{
  "hex": "#183a6f",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 111
  },
  "hsl": {
    "h": 216.552,
    "s": 64.444,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35467,
    "c": 0.10007,
    "h": 259.1
  },
  "luminance": 0.04368
}

Semantic roles & 50–950 ramp

primary

#183A6F

secondary

#A57D3E

accent

#A640E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A6F

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

Preview Lab → · Contrast checker → · Palette generator →