#171D4E#171D4E

#171D4E is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.090 H 273.1°. Best body text is #FFFFFF at 15.88:1 contrast (WCAG AA passes).

Color values

HEX	#171D4E
RGB	rgb(23, 29, 78)
HSL	hsl(233, 54%, 20%)
HSV	hsv(233, 71%, 31%)
CMYK	cmyk(70.5%, 62.8%, 0%, 69.4%)
CIE-LAB	lab(13.30, 15.51, -31.12)
CIE-LCH	lch(13.30, 34.77, 296.50°)
OKLab	oklab(25.86% 0.0049 -0.0895)
OKLCH	oklch(25.86% 0.09 273.1)
XYZ	xyz(2.1674, 1.6108, 7.4029)
Luminance	0.0161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D4E #4E4817

analogous

#17384E #171D4E #2D174E

triadic

#171D4E #4E171D #1D4E17

tetradic

#171D4E #4E1738 #4E4817 #174E2D

square

#171D4E #4E1738 #4E4817 #174E2D

split-complementary

#171D4E #4E2D17 #384E17

monochromatic

#070918 #090B1F #171D4E #252F7D #3340AD

Accessibility & contrast

On white

15.88

#171D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#171D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D4E

15.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D4E	#FFFFFF	#000000	##FFFFFF
##171D4E	1.00	15.88	1.32	15.88
#FFFFFF	15.88	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002550

Deuteranopia (green-blind)

#00204D

Tritanopia (blue-blind)

#002932

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171d4e;
/* rgb */ color: rgb(23, 29, 78);
/* oklch */ color: oklch(25.9% 0.090 273.1);

Tailwind

colors: {
  custom: {
    50: '#5c5880',
    500: '#171d4e',
    950: '#000000',
  },
}

SCSS

$custom: #171d4e;
$custom-light: #5c5880;
$custom-dark: #000000;

JSON

{
  "hex": "#171d4e",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 78
  },
  "hsl": {
    "h": 233.455,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.25862,
    "c": 0.08962,
    "h": 273.1
  },
  "luminance": 0.01611
}

Semantic roles & 50–950 ramp

primary

#171D4E

secondary

#857D3C

accent

#CE4ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171D4E

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

Preview Lab → · Contrast checker → · Palette generator →