#13183B#13183B

#13183B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.067 H 273.7°. Best body text is #FFFFFF at 17.19:1 contrast (WCAG AA passes).

Color values

HEX	#13183B
RGB	rgb(19, 24, 59)
HSL	hsl(233, 51%, 15%)
HSV	hsv(233, 68%, 23%)
CMYK	cmyk(67.8%, 59.3%, 0%, 76.9%)
CIE-LAB	lab(9.86, 10.66, -23.41)
CIE-LCH	lch(9.86, 25.72, 294.48°)
OKLab	oklab(22.7% 0.0043 -0.067)
OKLCH	oklch(22.7% 0.067 273.7)
XYZ	xyz(1.3844, 1.1074, 4.2776)
Luminance	0.0111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#13183B #3B3613

analogous

#132C3B #13183B #22133B

triadic

#13183B #3B1318 #183B13

tetradic

#13183B #3B132C #3B3613 #133B22

square

#13183B #3B132C #3B3613 #133B22

split-complementary

#13183B #3B2213 #2C3B13

monochromatic

#070917 #070917 #13183B #222B69 #313E98

Accessibility & contrast

On white

17.19

#13183B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#13183B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #13183B

17.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##13183B	#FFFFFF	#000000	##FFFFFF
##13183B	1.00	17.19	1.22	17.19
#FFFFFF	17.19	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051D3C

Deuteranopia (green-blind)

#011A3A

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #13183b;
/* rgb */ color: rgb(19, 24, 59);
/* oklch */ color: oklch(22.7% 0.067 273.7);

Tailwind

colors: {
  custom: {
    50: '#555471',
    500: '#13183b',
    950: '#000000',
  },
}

SCSS

$custom: #13183b;
$custom-light: #555471;
$custom-dark: #000000;

JSON

{
  "hex": "#13183b",
  "rgb": {
    "r": 19,
    "g": 24,
    "b": 59
  },
  "hsl": {
    "h": 232.5,
    "s": 51.282,
    "l": 15.294
  },
  "oklch": {
    "l": 0.22698,
    "c": 0.06714,
    "h": 273.7
  },
  "luminance": 0.01107
}

Semantic roles & 50–950 ramp

primary

#13183B

secondary

#736C36

accent

#C94DDB

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #13183B

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

Preview Lab → · Contrast checker → · Palette generator →