#173BA0#173BA0

#173BA0 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.8% C 0.169 H 264.6°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#173BA0
RGB	rgb(23, 59, 160)
HSL	hsl(224, 75%, 36%)
HSV	hsv(224, 86%, 63%)
CMYK	cmyk(85.6%, 63.1%, 0%, 37.3%)
CIE-LAB	lab(29.02, 27.41, -57.99)
CIE-LCH	lch(29.02, 64.14, 295.30°)
OKLab	oklab(39.84% -0.0159 -0.1679)
OKLCH	oklch(39.84% 0.169 264.6)
XYZ	xyz(8.2602, 5.8471, 33.9441)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173BA0 #A07C17

analogous

#177FA0 #173BA0 #3817A0

triadic

#173BA0 #A0173B #3BA017

tetradic

#173BA0 #A0177F #A07C17 #17A038

square

#173BA0 #A0177F #A07C17 #17A038

split-complementary

#173BA0 #A03817 #7FA017

monochromatic

#081435 #0F276A #173BA0 #1F4FD6 #4C74E5

Accessibility & contrast

On white

9.68

#173BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#173BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173BA0

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173BA0	#FFFFFF	#000000	##FFFFFF
##173BA0	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA3

Deuteranopia (green-blind)

#003E9E

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #173ba0;
/* rgb */ color: rgb(23, 59, 160);
/* oklch */ color: oklch(39.8% 0.169 264.6);

Tailwind

colors: {
  custom: {
    50: '#6f70bd',
    500: '#173ba0',
    950: '#000000',
  },
}

SCSS

$custom: #173ba0;
$custom-light: #6f70bd;
$custom-dark: #000000;

JSON

{
  "hex": "#173ba0",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 160
  },
  "hsl": {
    "h": 224.234,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39843,
    "c": 0.16865,
    "h": 264.6
  },
  "luminance": 0.05848
}

Semantic roles & 50–950 ramp

primary

#173BA0

secondary

#C7A74C

accent

#C036F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #173BA0

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

Preview Lab → · Contrast checker → · Palette generator →