#0D174E#0D174E

#0D174E is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.9% C 0.101 H 269.0°. Best body text is #FFFFFF at 16.81:1 contrast (WCAG AA passes).

Color values

HEX	#0D174E
RGB	rgb(13, 23, 78)
HSL	hsl(231, 71%, 18%)
HSV	hsv(231, 83%, 31%)
CMYK	cmyk(83.3%, 70.5%, 0%, 69.4%)
CIE-LAB	lab(10.91, 18.44, -35.04)
CIE-LCH	lch(10.91, 39.60, 297.76°)
OKLab	oklab(23.92% -0.0017 -0.1013)
OKLCH	oklch(23.92% 0.101 269)
XYZ	xyz(1.8470, 1.2482, 7.3498)
Luminance	0.0125 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0D174E #4E440D

analogous

#0D374E #0D174E #230D4E

triadic

#0D174E #4E0D17 #174E0D

tetradic

#0D174E #4E0D37 #4E440D #0D4E23

square

#0D174E #4E0D37 #4E440D #0D4E23

split-complementary

#0D174E #4E230D #374E0D

monochromatic

#04081A #04081A #0D174E #162682 #1E36B7

Accessibility & contrast

On white

16.81

#0D174E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#0D174E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0D174E

16.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0D174E	#FFFFFF	#000000	##FFFFFF
##0D174E	1.00	16.81	1.25	16.81
#FFFFFF	16.81	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002050

Deuteranopia (green-blind)

#001A4D

Tritanopia (blue-blind)

#002530

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #0d174e;
/* rgb */ color: rgb(13, 23, 78);
/* oklch */ color: oklch(23.9% 0.101 269.0);

Tailwind

colors: {
  custom: {
    50: '#585380',
    500: '#0d174e',
    950: '#000000',
  },
}

SCSS

$custom: #0d174e;
$custom-light: #585380;
$custom-dark: #000000;

JSON

{
  "hex": "#0d174e",
  "rgb": {
    "r": 13,
    "g": 23,
    "b": 78
  },
  "hsl": {
    "h": 230.769,
    "s": 71.429,
    "l": 17.843
  },
  "oklch": {
    "l": 0.23924,
    "c": 0.10135,
    "h": 269
  },
  "luminance": 0.01248
}

Semantic roles & 50–950 ramp

primary

#0D174E

secondary

#897B2E

accent

#D23AEE

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04020A

muted

#79787C

Preview Lab

Preview with #0D174E

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

Preview Lab → · Contrast checker → · Palette generator →