#171D54#171D54

#171D54 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.099 H 272.8°. Best body text is #FFFFFF at 15.67:1 contrast (WCAG AA passes).

Color values

HEX	#171D54
RGB	rgb(23, 29, 84)
HSL	hsl(234, 57%, 21%)
HSV	hsv(234, 73%, 33%)
CMYK	cmyk(72.6%, 65.5%, 0%, 67.1%)
CIE-LAB	lab(13.83, 17.95, -34.34)
CIE-LCH	lch(13.83, 38.75, 297.60°)
OKLab	oklab(26.43% 0.0049 -0.0989)
OKLCH	oklch(26.43% 0.099 272.8)
XYZ	xyz(2.3924, 1.7008, 8.5880)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D54 #544E17

analogous

#173B54 #171D54 #2F1754

triadic

#171D54 #54171D #1D5417

tetradic

#171D54 #54173B #544E17 #17542F

square

#171D54 #54173B #544E17 #17542F

split-complementary

#171D54 #542F17 #3B5417

monochromatic

#070818 #0A0C24 #171D54 #242E84 #313EB4

Accessibility & contrast

On white

15.67

#171D54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171D54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D54

15.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D54	#FFFFFF	#000000	##FFFFFF
##171D54	1.00	15.67	1.34	15.67
#FFFFFF	15.67	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002656

Deuteranopia (green-blind)

#002153

Tritanopia (blue-blind)

#002B35

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171d54;
/* rgb */ color: rgb(23, 29, 84);
/* oklch */ color: oklch(26.4% 0.099 272.8);

Tailwind

colors: {
  custom: {
    50: '#5d5885',
    500: '#171d54',
    950: '#000000',
  },
}

SCSS

$custom: #171d54;
$custom-light: #5d5885;
$custom-dark: #000000;

JSON

{
  "hex": "#171d54",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 84
  },
  "hsl": {
    "h": 234.098,
    "s": 57.009,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26428,
    "c": 0.09907,
    "h": 272.8
  },
  "luminance": 0.01701
}

Semantic roles & 50–950 ramp

primary

#171D54

secondary

#8B833C

accent

#D148E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171D54

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

Preview Lab → · Contrast checker → · Palette generator →