#183A6E#183A6E

#183A6E is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.4% C 0.099 H 258.8°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#183A6E
RGB	rgb(24, 58, 110)
HSL	hsl(216, 64%, 26%)
HSV	hsv(216, 78%, 43%)
CMYK	cmyk(78.2%, 47.3%, 0%, 56.9%)
CIE-LAB	lab(24.78, 7.78, -33.75)
CIE-LCH	lch(24.78, 34.64, 282.98°)
OKLab	oklab(35.39% -0.0191 -0.0967)
OKLCH	oklch(35.39% 0.099 258.8)
XYZ	xyz(4.7032, 4.3456, 15.3397)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A6E #6E4C18

analogous

#18656E #183A6E #21186E

triadic

#183A6E #6E183A #3A6E18

tetradic

#183A6E #6E1865 #6E4C18 #186E21

square

#183A6E #6E1865 #6E4C18 #186E21

split-complementary

#183A6E #6E2118 #656E18

monochromatic

#050D19 #0D203C #183A6E #2354A0 #2F6FD2

Accessibility & contrast

On white

11.23

#183A6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183A6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A6E

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A6E	#FFFFFF	#000000	##FFFFFF
##183A6E	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3F70

Deuteranopia (green-blind)

#0E376D

Tritanopia (blue-blind)

#00464E

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183a6e;
/* rgb */ color: rgb(24, 58, 110);
/* oklch */ color: oklch(35.4% 0.099 258.8);

Tailwind

colors: {
  custom: {
    50: '#626f98',
    500: '#183a6e',
    950: '#000000',
  },
}

SCSS

$custom: #183a6e;
$custom-light: #626f98;
$custom-dark: #000000;

JSON

{
  "hex": "#183a6e",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 110
  },
  "hsl": {
    "h": 216.279,
    "s": 64.179,
    "l": 26.275
  },
  "oklch": {
    "l": 0.35392,
    "c": 0.09858,
    "h": 258.8
  },
  "luminance": 0.04346
}

Semantic roles & 50–950 ramp

primary

#183A6E

secondary

#A47C3E

accent

#A541E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183A6E

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

Preview Lab → · Contrast checker → · Palette generator →