#173A86#173A86

#173A86 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.3% C 0.134 H 262.9°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#173A86
RGB	rgb(23, 58, 134)
HSL	hsl(221, 71%, 31%)
HSV	hsv(221, 83%, 53%)
CMYK	cmyk(82.8%, 56.7%, 0%, 47.5%)
CIE-LAB	lab(26.53, 17.60, -46.08)
CIE-LCH	lch(26.53, 49.33, 290.91°)
OKLab	oklab(37.29% -0.0164 -0.133)
OKLCH	oklch(37.29% 0.134 262.9)
XYZ	xyz(6.1679, 4.9288, 23.1759)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A86 #866317

analogous

#177186 #173A86 #2B1786

triadic

#173A86 #86173A #3A8617

tetradic

#173A86 #861771 #866317 #17862B

square

#173A86 #861771 #866317 #17862B

split-complementary

#173A86 #862B17 #718617

monochromatic

#050D1E #0E2352 #173A86 #2051BA #3A6EDD

Accessibility & contrast

On white

10.57

#173A86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173A86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A86

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A86	#FFFFFF	#000000	##FFFFFF
##173A86	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004489

Deuteranopia (green-blind)

#003A85

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173a86;
/* rgb */ color: rgb(23, 58, 134);
/* oklch */ color: oklch(37.3% 0.134 262.9);

Tailwind

colors: {
  custom: {
    50: '#686faa',
    500: '#173a86',
    950: '#000000',
  },
}

SCSS

$custom: #173a86;
$custom-light: #686faa;
$custom-dark: #000000;

JSON

{
  "hex": "#173a86",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 134
  },
  "hsl": {
    "h": 221.081,
    "s": 70.701,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37286,
    "c": 0.13401,
    "h": 262.9
  },
  "luminance": 0.0493
}

Semantic roles & 50–950 ramp

primary

#173A86

secondary

#BA933F

accent

#B53AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173A86

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

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