#171F53#171F53

#171F53 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.095 H 271.8°. Best body text is #FFFFFF at 15.47:1 contrast (WCAG AA passes).

Color values

HEX	#171F53
RGB	rgb(23, 31, 83)
HSL	hsl(232, 57%, 21%)
HSV	hsv(232, 72%, 33%)
CMYK	cmyk(72.3%, 62.7%, 0%, 67.5%)
CIE-LAB	lab(14.32, 16.07, -32.86)
CIE-LCH	lch(14.32, 36.58, 296.06°)
OKLab	oklab(26.77% 0.003 -0.0946)
OKLCH	oklch(26.77% 0.095 271.8)
XYZ	xyz(2.4041, 1.7864, 8.4001)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F53 #534B17

analogous

#173D53 #171F53 #2D1753

triadic

#171F53 #53171F #1F5317

tetradic

#171F53 #53173D #534B17 #17532D

square

#171F53 #53173D #534B17 #17532D

split-complementary

#171F53 #532D17 #3D5317

monochromatic

#070918 #0A0D23 #171F53 #243183 #3243B3

Accessibility & contrast

On white

15.47

#171F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F53

15.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F53	#FFFFFF	#000000	##FFFFFF
##171F53	1.00	15.47	1.36	15.47
#FFFFFF	15.47	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002755

Deuteranopia (green-blind)

#002252

Tritanopia (blue-blind)

#002C35

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171f53;
/* rgb */ color: rgb(23, 31, 83);
/* oklch */ color: oklch(26.8% 0.095 271.8);

Tailwind

colors: {
  custom: {
    50: '#5d5a84',
    500: '#171f53',
    950: '#000000',
  },
}

SCSS

$custom: #171f53;
$custom-light: #5d5a84;
$custom-dark: #000000;

JSON

{
  "hex": "#171f53",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 83
  },
  "hsl": {
    "h": 232,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26766,
    "c": 0.09463,
    "h": 271.8
  },
  "luminance": 0.01787
}

Semantic roles & 50–950 ramp

primary

#171F53

secondary

#8A803C

accent

#CC48E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171F53

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

Preview Lab → · Contrast checker → · Palette generator →