#171B59#171B59

#171B59 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.109 H 273.4°. Best body text is #FFFFFF at 15.70:1 contrast (WCAG AA passes).

Color values

HEX	#171B59
RGB	rgb(23, 27, 89)
HSL	hsl(236, 59%, 22%)
HSV	hsv(236, 74%, 35%)
CMYK	cmyk(74.2%, 69.7%, 0%, 65.1%)
CIE-LAB	lab(13.75, 21.40, -37.85)
CIE-LCH	lch(13.75, 43.48, 299.49°)
OKLab	oklab(26.52% 0.0064 -0.1093)
OKLCH	oklch(26.52% 0.109 273.4)
XYZ	xyz(2.5479, 1.6871, 9.6406)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B59 #595517

analogous

#173C59 #171B59 #341759

triadic

#171B59 #59171B #1B5917

tetradic

#171B59 #59173C #595517 #175934

square

#171B59 #59173C #595517 #175934

split-complementary

#171B59 #593417 #3C5917

monochromatic

#060718 #0A0C28 #171B59 #242A8A #3039BA

Accessibility & contrast

On white

15.70

#171B59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171B59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B59

15.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B59	#FFFFFF	#000000	##FFFFFF
##171B59	1.00	15.70	1.34	15.70
#FFFFFF	15.70	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265B

Deuteranopia (green-blind)

#002058

Tritanopia (blue-blind)

#002B37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171b59;
/* rgb */ color: rgb(23, 27, 89);
/* oklch */ color: oklch(26.5% 0.109 273.4);

Tailwind

colors: {
  custom: {
    50: '#5f5789',
    500: '#171b59',
    950: '#000000',
  },
}

SCSS

$custom: #171b59;
$custom-light: #5f5789;
$custom-dark: #000000;

JSON

{
  "hex": "#171b59",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 89
  },
  "hsl": {
    "h": 236.364,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26516,
    "c": 0.10946,
    "h": 273.4
  },
  "luminance": 0.01687
}

Semantic roles & 50–950 ramp

primary

#171B59

secondary

#908B3C

accent

#D946E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171B59

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

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