#173CA1#173CA1

#173CA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.169 H 264.4°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#173CA1
RGB	rgb(23, 60, 161)
HSL	hsl(224, 75%, 36%)
HSV	hsv(224, 86%, 63%)
CMYK	cmyk(85.7%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(29.38, 27.12, -58.01)
CIE-LCH	lch(29.38, 64.04, 295.06°)
OKLab	oklab(40.13% -0.0164 -0.168)
OKLCH	oklch(40.13% 0.169 264.4)
XYZ	xyz(8.3999, 5.9860, 34.4240)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173CA1 #A17C17

analogous

#1781A1 #173CA1 #3717A1

triadic

#173CA1 #A1173C #3CA117

tetradic

#173CA1 #A11781 #A17C17 #17A137

square

#173CA1 #A11781 #A17C17 #17A137

split-complementary

#173CA1 #A13717 #81A117

monochromatic

#081436 #0F286B #173CA1 #1F50D7 #4D76E6

Accessibility & contrast

On white

9.56

#173CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#173CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173CA1

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173CA1	#FFFFFF	#000000	##FFFFFF
##173CA1	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #173ca1;
/* rgb */ color: rgb(23, 60, 161);
/* oklch */ color: oklch(40.1% 0.169 264.4);

Tailwind

colors: {
  custom: {
    50: '#6f71be',
    500: '#173ca1',
    950: '#000000',
  },
}

SCSS

$custom: #173ca1;
$custom-light: #6f71be;
$custom-dark: #000000;

JSON

{
  "hex": "#173ca1",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 223.913,
    "s": 75,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40133,
    "c": 0.16876,
    "h": 264.4
  },
  "luminance": 0.05987
}

Semantic roles & 50–950 ramp

primary

#173CA1

secondary

#C7A64C

accent

#BF36F2

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #173CA1

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

Preview Lab → · Contrast checker → · Palette generator →