#172A5B#172A5B

#172A5B is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.0% C 0.091 H 265.3°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#172A5B
RGB	rgb(23, 42, 91)
HSL	hsl(223, 60%, 22%)
HSV	hsv(223, 75%, 36%)
CMYK	cmyk(74.7%, 53.8%, 0%, 64.3%)
CIE-LAB	lab(18.33, 11.22, -31.74)
CIE-LCH	lch(18.33, 33.66, 289.48°)
OKLab	oklab(30% -0.0075 -0.0911)
OKLCH	oklch(30% 0.091 265.3)
XYZ	xyz(3.0690, 2.5931, 10.2343)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A5B #5B4817

analogous

#174C5B #172A5B #26175B

triadic

#172A5B #5B172A #2A5B17

tetradic

#172A5B #5B174C #5B4817 #175B26

square

#172A5B #5B174C #5B4817 #175B26

split-complementary

#172A5B #5B2617 #4C5B17

monochromatic

#060B18 #0B132A #172A5B #23418C #3057BD

Accessibility & contrast

On white

13.83

#172A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A5B

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A5B	#FFFFFF	#000000	##FFFFFF
##172A5B	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E305D

Deuteranopia (green-blind)

#002A5A

Tritanopia (blue-blind)

#00363E

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172a5b;
/* rgb */ color: rgb(23, 42, 91);
/* oklch */ color: oklch(30.0% 0.091 265.3);

Tailwind

colors: {
  custom: {
    50: '#5e638a',
    500: '#172a5b',
    950: '#000000',
  },
}

SCSS

$custom: #172a5b;
$custom-light: #5e638a;
$custom-dark: #000000;

JSON

{
  "hex": "#172a5b",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 91
  },
  "hsl": {
    "h": 223.235,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.29996,
    "c": 0.09141,
    "h": 265.3
  },
  "luminance": 0.02593
}

Semantic roles & 50–950 ramp

primary

#172A5B

secondary

#927A3C

accent

#B745E3

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #172A5B

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

Preview Lab → · Contrast checker → · Palette generator →