#171F59#171F59

#171F59 is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.3% C 0.104 H 271.6°. Best body text is #FFFFFF at 15.25:1 contrast (WCAG AA passes).

Color values

HEX	#171F59
RGB	rgb(23, 31, 89)
HSL	hsl(233, 59%, 22%)
HSV	hsv(233, 74%, 35%)
CMYK	cmyk(74.2%, 65.2%, 0%, 65.1%)
CIE-LAB	lab(14.86, 18.51, -36.03)
CIE-LCH	lch(14.86, 40.51, 297.19°)
OKLab	oklab(27.33% 0.003 -0.1039)
OKLCH	oklch(27.33% 0.104 271.6)
XYZ	xyz(2.6459, 1.8831, 9.6733)
Luminance	0.0188 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F59 #595117

analogous

#174059 #171F59 #301759

triadic

#171F59 #59171F #1F5917

tetradic

#171F59 #591740 #595117 #175930

square

#171F59 #591740 #595117 #175930

split-complementary

#171F59 #593017 #405917

monochromatic

#060818 #0A0E28 #171F59 #24308A #3041BA

Accessibility & contrast

On white

15.25

#171F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#171F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F59

15.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F59	#FFFFFF	#000000	##FFFFFF
##171F59	1.00	15.25	1.38	15.25
#FFFFFF	15.25	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285B

Deuteranopia (green-blind)

#002258

Tritanopia (blue-blind)

#002E38

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171f59;
/* rgb */ color: rgb(23, 31, 89);
/* oklch */ color: oklch(27.3% 0.104 271.6);

Tailwind

colors: {
  custom: {
    50: '#5e5a88',
    500: '#171f59',
    950: '#000000',
  },
}

SCSS

$custom: #171f59;
$custom-light: #5e5a88;
$custom-dark: #000000;

JSON

{
  "hex": "#171f59",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 89
  },
  "hsl": {
    "h": 232.727,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.27334,
    "c": 0.10395,
    "h": 271.6
  },
  "luminance": 0.01883
}

Semantic roles & 50–950 ramp

primary

#171F59

secondary

#90863C

accent

#CF46E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171F59

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

Preview Lab → · Contrast checker → · Palette generator →