#183A70#183A70

#183A70 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.102 H 259.4°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#183A70
RGB	rgb(24, 58, 112)
HSL	hsl(217, 65%, 27%)
HSV	hsv(217, 79%, 44%)
CMYK	cmyk(78.6%, 48.2%, 0%, 56.1%)
CIE-LAB	lab(24.92, 8.61, -34.81)
CIE-LCH	lch(24.92, 35.86, 283.89°)
OKLab	oklab(35.54% -0.0187 -0.0998)
OKLCH	oklch(35.54% 0.102 259.4)
XYZ	xyz(4.8133, 4.3896, 15.9197)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A70 #704E18

analogous

#186670 #183A70 #221870

triadic

#183A70 #70183A #3A7018

tetradic

#183A70 #701866 #704E18 #187022

square

#183A70 #701866 #704E18 #187022

split-complementary

#183A70 #702218 #667018

monochromatic

#050D19 #0D203E #183A70 #2354A2 #306FD3

Accessibility & contrast

On white

11.18

#183A70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183A70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A70

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A70	#FFFFFF	#000000	##FFFFFF
##183A70	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3F72

Deuteranopia (green-blind)

#09376F

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183a70;
/* rgb */ color: rgb(24, 58, 112);
/* oklch */ color: oklch(35.5% 0.102 259.4);

Tailwind

colors: {
  custom: {
    50: '#636f99',
    500: '#183a70',
    950: '#000000',
  },
}

SCSS

$custom: #183a70;
$custom-light: #636f99;
$custom-dark: #000000;

JSON

{
  "hex": "#183a70",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 112
  },
  "hsl": {
    "h": 216.818,
    "s": 64.706,
    "l": 26.667
  },
  "oklch": {
    "l": 0.35542,
    "c": 0.10156,
    "h": 259.4
  },
  "luminance": 0.0439
}

Semantic roles & 50–950 ramp

primary

#183A70

secondary

#A57E3E

accent

#A740E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183A70

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

Preview Lab → · Contrast checker → · Palette generator →