#17173A#17173A

#17173A is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.066 H 279.8°. Best body text is #FFFFFF at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#17173A
RGB	rgb(23, 23, 58)
HSL	hsl(240, 43%, 16%)
HSV	hsv(240, 60%, 23%)
CMYK	cmyk(60.3%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(9.80, 12.03, -22.77)
CIE-LCH	lch(9.80, 25.75, 297.85°)
OKLab	oklab(22.72% 0.0112 -0.065)
OKLCH	oklch(22.72% 0.066 279.8)
XYZ	xyz(1.4232, 1.1004, 4.1396)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17173A #3A3A17

analogous

#17283A #17173A #28173A

triadic

#17173A #3A1717 #173A17

tetradic

#17173A #3A1728 #3A3A17 #173A28

square

#17173A #3A1728 #3A3A17 #173A28

split-complementary

#17173A #3A2817 #283A17

monochromatic

#090916 #090916 #17173A #282866 #3A3A92

Accessibility & contrast

On white

17.21

#17173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#17173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17173A

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17173A	#FFFFFF	#000000	##FFFFFF
##17173A	1.00	17.21	1.22	17.21
#FFFFFF	17.21	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051C3B

Deuteranopia (green-blind)

#031A39

Tritanopia (blue-blind)

#081F25

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #17173a;
/* rgb */ color: rgb(23, 23, 58);
/* oklch */ color: oklch(22.7% 0.066 279.8);

Tailwind

colors: {
  custom: {
    50: '#575370',
    500: '#17173a',
    950: '#000000',
  },
}

SCSS

$custom: #17173a;
$custom-light: #575370;
$custom-dark: #000000;

JSON

{
  "hex": "#17173a",
  "rgb": {
    "r": 23,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 240,
    "s": 43.21,
    "l": 15.882
  },
  "oklch": {
    "l": 0.22719,
    "c": 0.06595,
    "h": 279.8
  },
  "luminance": 0.011
}

Semantic roles & 50–950 ramp

primary

#17173A

secondary

#71713C

accent

#D355D3

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #17173A

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

Preview Lab → · Contrast checker → · Palette generator →