#183A6A#183A6A

#183A6A is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.1% C 0.093 H 257.6°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#183A6A
RGB	rgb(24, 58, 106)
HSL	hsl(215, 63%, 25%)
HSV	hsv(215, 77%, 42%)
CMYK	cmyk(77.4%, 45.3%, 0%, 58.4%)
CIE-LAB	lab(24.51, 6.12, -31.62)
CIE-LCH	lch(24.51, 32.20, 280.96°)
OKLab	oklab(35.1% -0.02 -0.0904)
OKLCH	oklch(35.1% 0.093 257.6)
XYZ	xyz(4.4903, 4.2604, 14.2186)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A6A #6A4818

analogous

#18636A #183A6A #1F186A

triadic

#183A6A #6A183A #3A6A18

tetradic

#183A6A #6A1863 #6A4818 #186A1F

square

#183A6A #6A1863 #6A4818 #186A1F

split-complementary

#183A6A #6A1F18 #636A18

monochromatic

#060E19 #0D1F38 #183A6A #23559C #2F71CE

Accessibility & contrast

On white

11.34

#183A6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183A6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A6A

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A6A	#FFFFFF	#000000	##FFFFFF
##183A6A	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233E6C

Deuteranopia (green-blind)

#143769

Tritanopia (blue-blind)

#00454C

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183a6a;
/* rgb */ color: rgb(24, 58, 106);
/* oklch */ color: oklch(35.1% 0.093 257.6);

Tailwind

colors: {
  custom: {
    50: '#616f95',
    500: '#183a6a',
    950: '#000000',
  },
}

SCSS

$custom: #183a6a;
$custom-light: #616f95;
$custom-dark: #000000;

JSON

{
  "hex": "#183a6a",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 106
  },
  "hsl": {
    "h": 215.122,
    "s": 63.077,
    "l": 25.49
  },
  "oklch": {
    "l": 0.35098,
    "c": 0.0926,
    "h": 257.6
  },
  "luminance": 0.04261
}

Semantic roles & 50–950 ramp

primary

#183A6A

secondary

#A0773E

accent

#A242E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183A6A

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

Preview Lab → · Contrast checker → · Palette generator →