#172F5B#172F5B

#172F5B is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.2% C 0.084 H 261.4°. Best body text is #FFFFFF at 13.17:1 contrast (WCAG AA passes).

Color values

HEX	#172F5B
RGB	rgb(23, 47, 91)
HSL	hsl(219, 60%, 22%)
HSV	hsv(219, 75%, 36%)
CMYK	cmyk(74.7%, 48.4%, 0%, 64.3%)
CIE-LAB	lab(19.92, 7.57, -29.18)
CIE-LCH	lch(19.92, 30.15, 284.54°)
OKLab	oklab(31.21% -0.0127 -0.0835)
OKLCH	oklch(31.21% 0.084 261.4)
XYZ	xyz(3.2575, 2.9702, 10.2971)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F5B #5B4317

analogous

#17515B #172F5B #21175B

triadic

#172F5B #5B172F #2F5B17

tetradic

#172F5B #5B1751 #5B4317 #175B21

square

#172F5B #5B1751 #5B4317 #175B21

split-complementary

#172F5B #5B2117 #515B17

monochromatic

#060D18 #0B162A #172F5B #23488C #3061BD

Accessibility & contrast

On white

13.17

#172F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#172F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F5B

13.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F5B	#FFFFFF	#000000	##FFFFFF
##172F5B	1.00	13.17	1.59	13.17
#FFFFFF	13.17	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19335D

Deuteranopia (green-blind)

#0C2D5A

Tritanopia (blue-blind)

#003940

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172f5b;
/* rgb */ color: rgb(23, 47, 91);
/* oklch */ color: oklch(31.2% 0.084 261.4);

Tailwind

colors: {
  custom: {
    50: '#5e678a',
    500: '#172f5b',
    950: '#000000',
  },
}

SCSS

$custom: #172f5b;
$custom-light: #5e678a;
$custom-dark: #000000;

JSON

{
  "hex": "#172f5b",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 91
  },
  "hsl": {
    "h": 218.824,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.31213,
    "c": 0.08446,
    "h": 261.4
  },
  "luminance": 0.02971
}

Semantic roles & 50–950 ramp

primary

#172F5B

secondary

#92743C

accent

#AB45E3

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #172F5B

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

Preview Lab → · Contrast checker → · Palette generator →