#17173C#17173C

#17173C is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.9% C 0.069 H 279.4°. Best body text is #FFFFFF at 17.15:1 contrast (WCAG AA passes).

Color values

HEX	#17173C
RGB	rgb(23, 23, 60)
HSL	hsl(240, 45%, 16%)
HSV	hsv(240, 62%, 24%)
CMYK	cmyk(61.7%, 61.7%, 0%, 76.5%)
CIE-LAB	lab(9.96, 12.81, -23.94)
CIE-LCH	lch(9.96, 27.15, 298.16°)
OKLab	oklab(22.89% 0.0114 -0.0684)
OKLCH	oklch(22.89% 0.069 279.4)
XYZ	xyz(1.4751, 1.1211, 4.4128)
Luminance	0.0112 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17173C #3C3C17

analogous

#172A3C #17173C #2A173C

triadic

#17173C #3C1717 #173C17

tetradic

#17173C #3C172A #3C3C17 #173C2A

square

#17173C #3C172A #3C3C17 #173C2A

split-complementary

#17173C #3C2A17 #2A3C17

monochromatic

#080816 #080816 #17173C #282868 #393994

Accessibility & contrast

On white

17.15

#17173C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#17173C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17173C

17.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17173C	#FFFFFF	#000000	##FFFFFF
##17173C	1.00	17.15	1.22	17.15
#FFFFFF	17.15	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041D3D

Deuteranopia (green-blind)

#011A3B

Tritanopia (blue-blind)

#071F26

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #17173c;
/* rgb */ color: rgb(23, 23, 60);
/* oklch */ color: oklch(22.9% 0.069 279.4);

Tailwind

colors: {
  custom: {
    50: '#585372',
    500: '#17173c',
    950: '#000000',
  },
}

SCSS

$custom: #17173c;
$custom-light: #585372;
$custom-dark: #000000;

JSON

{
  "hex": "#17173c",
  "rgb": {
    "r": 23,
    "g": 23,
    "b": 60
  },
  "hsl": {
    "h": 240,
    "s": 44.578,
    "l": 16.275
  },
  "oklch": {
    "l": 0.22891,
    "c": 0.06936,
    "h": 279.4
  },
  "luminance": 0.01121
}

Semantic roles & 50–950 ramp

primary

#17173C

secondary

#73733C

accent

#D454D4

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030208

muted

#78787B

Preview Lab

Preview with #17173C

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

Preview Lab → · Contrast checker → · Palette generator →