#171D4F#171D4F

#171D4F is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.0% C 0.091 H 273.1°. Best body text is #FFFFFF at 15.85:1 contrast (WCAG AA passes).

Color values

HEX	#171D4F
RGB	rgb(23, 29, 79)
HSL	hsl(234, 55%, 20%)
HSV	hsv(234, 71%, 31%)
CMYK	cmyk(70.9%, 63.3%, 0%, 69%)
CIE-LAB	lab(13.38, 15.92, -31.66)
CIE-LCH	lch(13.38, 35.44, 296.69°)
OKLab	oklab(25.95% 0.0049 -0.0911)
OKLCH	oklch(25.95% 0.091 273.1)
XYZ	xyz(2.2035, 1.6252, 7.5932)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D4F #4F4917

analogous

#17394F #171D4F #2D174F

triadic

#171D4F #4F171D #1D4F17

tetradic

#171D4F #4F1739 #4F4917 #174F2D

square

#171D4F #4F1739 #4F4917 #174F2D

split-complementary

#171D4F #4F2D17 #394F17

monochromatic

#070918 #090C20 #171D4F #252E7E #3340AE

Accessibility & contrast

On white

15.85

#171D4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#171D4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D4F

15.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D4F	#FFFFFF	#000000	##FFFFFF
##171D4F	1.00	15.85	1.33	15.85
#FFFFFF	15.85	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002551

Deuteranopia (green-blind)

#00204E

Tritanopia (blue-blind)

#002932

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171d4f;
/* rgb */ color: rgb(23, 29, 79);
/* oklch */ color: oklch(26.0% 0.091 273.1);

Tailwind

colors: {
  custom: {
    50: '#5c5881',
    500: '#171d4f',
    950: '#000000',
  },
}

SCSS

$custom: #171d4f;
$custom-light: #5c5881;
$custom-dark: #000000;

JSON

{
  "hex": "#171d4f",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 79
  },
  "hsl": {
    "h": 233.571,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.25954,
    "c": 0.09122,
    "h": 273.1
  },
  "luminance": 0.01625
}

Semantic roles & 50–950 ramp

primary

#171D4F

secondary

#867E3C

accent

#CE4ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171D4F

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

Preview Lab → · Contrast checker → · Palette generator →