#172858#172858

#172858 is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.3% C 0.090 H 266.3°. Best body text is #FFFFFF at 14.18:1 contrast (WCAG AA passes).

Color values

HEX	#172858
RGB	rgb(23, 40, 88)
HSL	hsl(224, 59%, 22%)
HSV	hsv(224, 74%, 35%)
CMYK	cmyk(73.9%, 54.5%, 0%, 65.5%)
CIE-LAB	lab(17.48, 11.45, -31.12)
CIE-LCH	lch(17.48, 33.16, 290.20°)
OKLab	oklab(29.27% -0.0058 -0.0893)
OKLCH	oklch(29.27% 0.09 266.3)
XYZ	xyz(2.8730, 2.4040, 9.5432)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172858 #584717

analogous

#174958 #172858 #271758

triadic

#172858 #581728 #285817

tetradic

#172858 #581749 #584717 #175827

square

#172858 #581749 #584717 #175827

split-complementary

#172858 #582717 #495817

monochromatic

#060B18 #0A1227 #172858 #243E89 #3054B9

Accessibility & contrast

On white

14.18

#172858 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172858 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172858

14.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172858	#FFFFFF	#000000	##FFFFFF
##172858	1.00	14.18	1.48	14.18
#FFFFFF	14.18	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C2E5A

Deuteranopia (green-blind)

#002857

Tritanopia (blue-blind)

#00333B

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172858;
/* rgb */ color: rgb(23, 40, 88);
/* oklch */ color: oklch(29.3% 0.090 266.3);

Tailwind

colors: {
  custom: {
    50: '#5d6187',
    500: '#172858',
    950: '#000000',
  },
}

SCSS

$custom: #172858;
$custom-light: #5d6187;
$custom-dark: #000000;

JSON

{
  "hex": "#172858",
  "rgb": {
    "r": 23,
    "g": 40,
    "b": 88
  },
  "hsl": {
    "h": 224.308,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.29272,
    "c": 0.08951,
    "h": 266.3
  },
  "luminance": 0.02404
}

Semantic roles & 50–950 ramp

primary

#172858

secondary

#8F793C

accent

#B946E2

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172858

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

Preview Lab → · Contrast checker → · Palette generator →