#173B8E#173B8E

#173B8E is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.144 H 263.4°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#173B8E
RGB	rgb(23, 59, 142)
HSL	hsl(222, 72%, 32%)
HSV	hsv(222, 84%, 56%)
CMYK	cmyk(83.8%, 58.5%, 0%, 44.3%)
CIE-LAB	lab(27.47, 20.18, -49.52)
CIE-LCH	lch(27.47, 53.47, 292.17°)
OKLab	oklab(38.2% -0.0165 -0.1431)
OKLCH	oklch(38.2% 0.144 263.4)
XYZ	xyz(6.7981, 5.2623, 26.2434)
Luminance	0.0526 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B8E #8E6A17

analogous

#17768E #173B8E #2F178E

triadic

#173B8E #8E173B #3B8E17

tetradic

#173B8E #8E1776 #8E6A17 #178E2F

square

#173B8E #8E1776 #8E6A17 #178E2F

split-complementary

#173B8E #8E2F17 #768E17

monochromatic

#060F25 #0E2559 #173B8E #2051C3 #3F70E0

Accessibility & contrast

On white

10.23

#173B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#173B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B8E

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B8E	#FFFFFF	#000000	##FFFFFF
##173B8E	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003C8C

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173b8e;
/* rgb */ color: rgb(23, 59, 142);
/* oklch */ color: oklch(38.2% 0.144 263.4);

Tailwind

colors: {
  custom: {
    50: '#6a70b0',
    500: '#173b8e',
    950: '#000000',
  },
}

SCSS

$custom: #173b8e;
$custom-light: #6a70b0;
$custom-dark: #000000;

JSON

{
  "hex": "#173b8e",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 142
  },
  "hsl": {
    "h": 221.849,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38198,
    "c": 0.14402,
    "h": 263.4
  },
  "luminance": 0.05263
}

Semantic roles & 50–950 ramp

primary

#173B8E

secondary

#C09A40

accent

#B839EF

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #173B8E

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

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