#173B90#173B90

#173B90 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.147 H 263.6°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#173B90
RGB	rgb(23, 59, 144)
HSL	hsl(222, 72%, 33%)
HSV	hsv(222, 84%, 56%)
CMYK	cmyk(84%, 59%, 0%, 43.5%)
CIE-LAB	lab(27.64, 20.99, -50.48)
CIE-LCH	lch(27.64, 54.67, 292.58°)
OKLab	oklab(38.38% -0.0164 -0.1459)
OKLCH	oklch(38.38% 0.147 263.6)
XYZ	xyz(6.9496, 5.3229, 27.0413)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B90 #906C17

analogous

#177790 #173B90 #301790

triadic

#173B90 #90173B #3B9017

tetradic

#173B90 #901777 #906C17 #179030

square

#173B90 #901777 #906C17 #179030

split-complementary

#173B90 #903017 #779017

monochromatic

#061026 #0F255B #173B90 #1F51C5 #4170E1

Accessibility & contrast

On white

10.17

#173B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#173B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B90

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B90	#FFFFFF	#000000	##FFFFFF
##173B90	1.00	10.17	2.06	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004793

Deuteranopia (green-blind)

#003C8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173b90;
/* rgb */ color: rgb(23, 59, 144);
/* oklch */ color: oklch(38.4% 0.147 263.6);

Tailwind

colors: {
  custom: {
    50: '#6b70b1',
    500: '#173b90',
    950: '#000000',
  },
}

SCSS

$custom: #173b90;
$custom-light: #6b70b1;
$custom-dark: #000000;

JSON

{
  "hex": "#173b90",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 144
  },
  "hsl": {
    "h": 222.149,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38376,
    "c": 0.14682,
    "h": 263.6
  },
  "luminance": 0.05324
}

Semantic roles & 50–950 ramp

primary

#173B90

secondary

#C19B42

accent

#B939EF

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #173B90

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

Preview Lab → · Contrast checker → · Palette generator →