#171237#171237

#171237 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.3% C 0.069 H 285.0°. Best body text is #FFFFFF at 17.82:1 contrast (WCAG AA passes).

Color values

HEX	#171237
RGB	rgb(23, 18, 55)
HSL	hsl(248, 51%, 14%)
HSV	hsv(248, 67%, 22%)
CMYK	cmyk(58.2%, 67.3%, 0%, 78.4%)
CIE-LAB	lab(8.04, 14.67, -23.44)
CIE-LCH	lch(8.04, 27.65, 302.04°)
OKLab	oklab(21.33% 0.018 -0.067)
OKLCH	oklch(21.33% 0.069 285)
XYZ	xyz(1.2590, 0.8905, 3.7192)
Luminance	0.0089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171237 #323712

analogous

#122037 #171237 #2A1237

triadic

#171237 #371712 #123717

tetradic

#171237 #371220 #323712 #12372A

square

#171237 #371220 #323712 #12372A

split-complementary

#171237 #372A12 #203712

monochromatic

#0A0817 #0A0817 #171237 #2A2165 #3E3093

Accessibility & contrast

On white

17.82

#171237 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#171237 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171237

17.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171237	#FFFFFF	#000000	##FFFFFF
##171237	1.00	17.82	1.18	17.82
#FFFFFF	17.82	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001938

Deuteranopia (green-blind)

#001636

Tritanopia (blue-blind)

#0B1A22

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #171237;
/* rgb */ color: rgb(23, 18, 55);
/* oklch */ color: oklch(21.3% 0.069 285.0);

Tailwind

colors: {
  custom: {
    50: '#574f6e',
    500: '#171237',
    950: '#000000',
  },
}

SCSS

$custom: #171237;
$custom-light: #574f6e;
$custom-dark: #000000;

JSON

{
  "hex": "#171237",
  "rgb": {
    "r": 23,
    "g": 18,
    "b": 55
  },
  "hsl": {
    "h": 248.108,
    "s": 50.685,
    "l": 14.314
  },
  "oklch": {
    "l": 0.21332,
    "c": 0.06938,
    "h": 285
  },
  "luminance": 0.00891
}

Semantic roles & 50–950 ramp

primary

#171237

secondary

#687035

accent

#DA4EC7

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #171237

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

Preview Lab → · Contrast checker → · Palette generator →