#172F59#172F59

#172F59 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.1% C 0.081 H 260.7°. Best body text is #FFFFFF at 13.23:1 contrast (WCAG AA passes).

Color values

HEX	#172F59
RGB	rgb(23, 47, 89)
HSL	hsl(218, 59%, 22%)
HSV	hsv(218, 74%, 35%)
CMYK	cmyk(74.2%, 47.2%, 0%, 65.1%)
CIE-LAB	lab(19.79, 6.73, -28.08)
CIE-LCH	lch(19.79, 28.87, 283.49°)
OKLab	oklab(31.06% -0.0131 -0.0802)
OKLCH	oklch(31.06% 0.081 260.7)
XYZ	xyz(3.1724, 2.9361, 9.8488)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F59 #594117

analogous

#175059 #172F59 #201759

triadic

#172F59 #59172F #2F5917

tetradic

#172F59 #591750 #594117 #175920

square

#172F59 #591750 #594117 #175920

split-complementary

#172F59 #592017 #505917

monochromatic

#060D18 #0A1528 #172F59 #24498A #3062BA

Accessibility & contrast

On white

13.23

#172F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#172F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F59

13.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F59	#FFFFFF	#000000	##FFFFFF
##172F59	1.00	13.23	1.59	13.23
#FFFFFF	13.23	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B335B

Deuteranopia (green-blind)

#0F2D58

Tritanopia (blue-blind)

#00393F

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172f59;
/* rgb */ color: rgb(23, 47, 89);
/* oklch */ color: oklch(31.1% 0.081 260.7);

Tailwind

colors: {
  custom: {
    50: '#5d6788',
    500: '#172f59',
    950: '#000000',
  },
}

SCSS

$custom: #172f59;
$custom-light: #5d6788;
$custom-dark: #000000;

JSON

{
  "hex": "#172f59",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 89
  },
  "hsl": {
    "h": 218.182,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.31062,
    "c": 0.08131,
    "h": 260.7
  },
  "luminance": 0.02936
}

Semantic roles & 50–950 ramp

primary

#172F59

secondary

#90713C

accent

#A946E2

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #172F59

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

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