#183C70#183C70

#183C70 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.0% C 0.099 H 258.0°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#183C70
RGB	rgb(24, 60, 112)
HSL	hsl(215, 65%, 27%)
HSV	hsv(215, 79%, 44%)
CMYK	cmyk(78.6%, 46.4%, 0%, 56.1%)
CIE-LAB	lab(25.55, 7.20, -33.80)
CIE-LCH	lch(25.55, 34.56, 282.03°)
OKLab	oklab(36.03% -0.0206 -0.0968)
OKLCH	oklch(36.03% 0.099 258)
XYZ	xyz(4.9161, 4.5952, 15.9540)
Luminance	0.0460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C70 #704C18

analogous

#186870 #183C70 #201870

triadic

#183C70 #70183C #3C7018

tetradic

#183C70 #701868 #704C18 #187020

square

#183C70 #701868 #704C18 #187020

split-complementary

#183C70 #702018 #687018

monochromatic

#050D19 #0D213E #183C70 #2357A2 #3072D3

Accessibility & contrast

On white

10.94

#183C70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183C70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C70

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C70	#FFFFFF	#000000	##FFFFFF
##183C70	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224172

Deuteranopia (green-blind)

#10396F

Tritanopia (blue-blind)

#004850

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183c70;
/* rgb */ color: rgb(24, 60, 112);
/* oklch */ color: oklch(36.0% 0.099 258.0);

Tailwind

colors: {
  custom: {
    50: '#637199',
    500: '#183c70',
    950: '#000000',
  },
}

SCSS

$custom: #183c70;
$custom-light: #637199;
$custom-dark: #000000;

JSON

{
  "hex": "#183c70",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 112
  },
  "hsl": {
    "h": 215.455,
    "s": 64.706,
    "l": 26.667
  },
  "oklch": {
    "l": 0.36028,
    "c": 0.09898,
    "h": 258
  },
  "luminance": 0.04596
}

Semantic roles & 50–950 ramp

primary

#183C70

secondary

#A57B3E

accent

#A340E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C70

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

Preview Lab → · Contrast checker → · Palette generator →