#171D57#171D57

#171D57 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.7% C 0.104 H 272.7°. Best body text is #FFFFFF at 15.56:1 contrast (WCAG AA passes).

Color values

HEX	#171D57
RGB	rgb(23, 29, 87)
HSL	hsl(234, 58%, 22%)
HSV	hsv(234, 74%, 34%)
CMYK	cmyk(73.6%, 66.7%, 0%, 65.9%)
CIE-LAB	lab(14.11, 19.16, -35.91)
CIE-LCH	lch(14.11, 40.70, 298.08°)
OKLab	oklab(26.72% 0.0048 -0.1036)
OKLCH	oklch(26.72% 0.104 272.7)
XYZ	xyz(2.5124, 1.7488, 9.2201)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D57 #575117

analogous

#173D57 #171D57 #311757

triadic

#171D57 #57171D #1D5717

tetradic

#171D57 #57173D #575117 #175731

square

#171D57 #57173D #575117 #175731

split-complementary

#171D57 #573117 #3D5717

monochromatic

#060818 #0A0D27 #171D57 #242D87 #313DB8

Accessibility & contrast

On white

15.56

#171D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D57

15.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D57	#FFFFFF	#000000	##FFFFFF
##171D57	1.00	15.56	1.35	15.56
#FFFFFF	15.56	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002759

Deuteranopia (green-blind)

#002156

Tritanopia (blue-blind)

#002C36

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171d57;
/* rgb */ color: rgb(23, 29, 87);
/* oklch */ color: oklch(26.7% 0.104 272.7);

Tailwind

colors: {
  custom: {
    50: '#5e5887',
    500: '#171d57',
    950: '#000000',
  },
}

SCSS

$custom: #171d57;
$custom-light: #5e5887;
$custom-dark: #000000;

JSON

{
  "hex": "#171d57",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 87
  },
  "hsl": {
    "h": 234.375,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.2672,
    "c": 0.10369,
    "h": 272.7
  },
  "luminance": 0.01749
}

Semantic roles & 50–950 ramp

primary

#171D57

secondary

#8E863C

accent

#D346E1

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171D57

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

Preview Lab → · Contrast checker → · Palette generator →