#173A89#173A89

#173A89 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.138 H 263.3°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#173A89
RGB	rgb(23, 58, 137)
HSL	hsl(222, 71%, 31%)
HSV	hsv(222, 83%, 54%)
CMYK	cmyk(83.2%, 57.7%, 0%, 46.3%)
CIE-LAB	lab(26.77, 18.84, -47.56)
CIE-LCH	lch(26.77, 51.15, 291.61°)
OKLab	oklab(37.55% -0.0162 -0.1373)
OKLCH	oklch(37.55% 0.138 263.3)
XYZ	xyz(6.3801, 5.0136, 24.2935)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A89 #896617

analogous

#177389 #173A89 #2D1789

triadic

#173A89 #89173A #3A8917

tetradic

#173A89 #891773 #896617 #17892D

square

#173A89 #891773 #896617 #17892D

split-complementary

#173A89 #892D17 #738917

monochromatic

#050E20 #0E2455 #173A89 #2050BD #3C6EDE

Accessibility & contrast

On white

10.49

#173A89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173A89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A89

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A89	#FFFFFF	#000000	##FFFFFF
##173A89	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458C

Deuteranopia (green-blind)

#003A87

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173a89;
/* rgb */ color: rgb(23, 58, 137);
/* oklch */ color: oklch(37.5% 0.138 263.3);

Tailwind

colors: {
  custom: {
    50: '#696fac',
    500: '#173a89',
    950: '#000000',
  },
}

SCSS

$custom: #173a89;
$custom-light: #696fac;
$custom-dark: #000000;

JSON

{
  "hex": "#173a89",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 137
  },
  "hsl": {
    "h": 221.579,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.37545,
    "c": 0.13828,
    "h": 263.3
  },
  "luminance": 0.05014
}

Semantic roles & 50–950 ramp

primary

#173A89

secondary

#BD963F

accent

#B73AEE

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173A89

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

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