#170D4B#170D4B

#170D4B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.5% C 0.107 H 280.8°. Best body text is #FFFFFF at 17.56:1 contrast (WCAG AA passes).

Color values

HEX	#170D4B
RGB	rgb(23, 13, 75)
HSL	hsl(250, 70%, 17%)
HSV	hsv(250, 83%, 29%)
CMYK	cmyk(69.3%, 82.7%, 0%, 70.6%)
CIE-LAB	lab(8.81, 25.53, -36.39)
CIE-LCH	lch(8.81, 44.45, 305.05°)
OKLab	oklab(22.51% 0.0201 -0.105)
OKLCH	oklch(22.51% 0.107 280.8)
XYZ	xyz(1.7669, 0.9779, 6.7509)
Luminance	0.0098 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170D4B #414B0D

analogous

#0D224B #170D4B #360D4B

triadic

#170D4B #4B170D #0D4B17

tetradic

#170D4B #4B0D22 #414B0D #0D4B36

square

#170D4B #4B0D22 #414B0D #0D4B36

split-complementary

#170D4B #4B360D #224B0D

monochromatic

#08051A #08051A #170D4B #27167F #371FB3

Accessibility & contrast

On white

17.56

#170D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#170D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170D4B

17.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170D4B	#FFFFFF	#000000	##FFFFFF
##170D4B	1.00	17.56	1.20	17.56
#FFFFFF	17.56	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4D

Deuteranopia (green-blind)

#00174A

Tritanopia (blue-blind)

#001F2B

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #170d4b;
/* rgb */ color: rgb(23, 13, 75);
/* oklch */ color: oklch(22.5% 0.107 280.8);

Tailwind

colors: {
  custom: {
    50: '#5c4d7e',
    500: '#170d4b',
    950: '#000000',
  },
}

SCSS

$custom: #170d4b;
$custom-light: #5c4d7e;
$custom-dark: #000000;

JSON

{
  "hex": "#170d4b",
  "rgb": {
    "r": 23,
    "g": 13,
    "b": 75
  },
  "hsl": {
    "h": 249.677,
    "s": 70.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.22507,
    "c": 0.10689,
    "h": 280.8
  },
  "luminance": 0.00978
}

Semantic roles & 50–950 ramp

primary

#170D4B

secondary

#78862E

accent

#ED3BD0

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05010A

muted

#79777C

Preview Lab

Preview with #170D4B

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

Preview Lab → · Contrast checker → · Palette generator →