#172A53#172A53

#172A53 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.4% C 0.079 H 263.6°. Best body text is #FFFFFF at 14.07:1 contrast (WCAG AA passes).

Color values

HEX	#172A53
RGB	rgb(23, 42, 83)
HSL	hsl(221, 57%, 21%)
HSV	hsv(221, 72%, 33%)
CMYK	cmyk(72.3%, 49.4%, 0%, 67.5%)
CIE-LAB	lab(17.75, 7.89, -27.33)
CIE-LCH	lch(17.75, 28.45, 286.09°)
OKLab	oklab(29.36% -0.0088 -0.0781)
OKLCH	oklch(29.36% 0.079 263.6)
XYZ	xyz(2.7421, 2.4624, 8.5127)
Luminance	0.0246 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A53 #534017

analogous

#174853 #172A53 #221753

triadic

#172A53 #53172A #2A5317

tetradic

#172A53 #531748 #534017 #175322

square

#172A53 #531748 #534017 #175322

split-complementary

#172A53 #532217 #485317

monochromatic

#070C18 #0A1223 #172A53 #244283 #325AB3

Accessibility & contrast

On white

14.07

#172A53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#172A53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A53

14.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A53	#FFFFFF	#000000	##FFFFFF
##172A53	1.00	14.07	1.49	14.07
#FFFFFF	14.07	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#162E55

Deuteranopia (green-blind)

#0B2952

Tritanopia (blue-blind)

#00333A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172a53;
/* rgb */ color: rgb(23, 42, 83);
/* oklch */ color: oklch(29.4% 0.079 263.6);

Tailwind

colors: {
  custom: {
    50: '#5c6384',
    500: '#172a53',
    950: '#000000',
  },
}

SCSS

$custom: #172a53;
$custom-light: #5c6384;
$custom-dark: #000000;

JSON

{
  "hex": "#172a53",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 83
  },
  "hsl": {
    "h": 221,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.29359,
    "c": 0.07864,
    "h": 263.6
  },
  "luminance": 0.02463
}

Semantic roles & 50–950 ramp

primary

#172A53

secondary

#8A713C

accent

#B048E0

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#04050B

muted

#79797C

Preview Lab

Preview with #172A53

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

Preview Lab → · Contrast checker → · Palette generator →