#173CA0#173CA0

#173CA0 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.0% C 0.167 H 264.4°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#173CA0
RGB	rgb(23, 60, 160)
HSL	hsl(224, 75%, 36%)
HSV	hsv(224, 86%, 63%)
CMYK	cmyk(85.6%, 62.5%, 0%, 37.3%)
CIE-LAB	lab(29.29, 26.73, -57.55)
CIE-LCH	lch(29.29, 63.46, 294.91°)
OKLab	oklab(40.04% -0.0164 -0.1666)
OKLCH	oklch(40.04% 0.167 264.4)
XYZ	xyz(8.3121, 5.9509, 33.9614)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173CA0 #A07B17

analogous

#1780A0 #173CA0 #3717A0

triadic

#173CA0 #A0173C #3CA017

tetradic

#173CA0 #A01780 #A07B17 #17A037

square

#173CA0 #A01780 #A07B17 #17A037

split-complementary

#173CA0 #A03717 #80A017

monochromatic

#081435 #0F286A #173CA0 #1F50D6 #4C75E5

Accessibility & contrast

On white

9.59

#173CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#173CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173CA0

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173CA0	#FFFFFF	#000000	##FFFFFF
##173CA0	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#003F9E

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #173ca0;
/* rgb */ color: rgb(23, 60, 160);
/* oklch */ color: oklch(40.0% 0.167 264.4);

Tailwind

colors: {
  custom: {
    50: '#6f71bd',
    500: '#173ca0',
    950: '#000000',
  },
}

SCSS

$custom: #173ca0;
$custom-light: #6f71bd;
$custom-dark: #000000;

JSON

{
  "hex": "#173ca0",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 160
  },
  "hsl": {
    "h": 223.796,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40039,
    "c": 0.16743,
    "h": 264.4
  },
  "luminance": 0.05952
}

Semantic roles & 50–950 ramp

primary

#173CA0

secondary

#C7A64C

accent

#BF36F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #173CA0

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

Preview Lab → · Contrast checker → · Palette generator →