#173DA0#173DA0

#173DA0 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.166 H 264.1°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#173DA0
RGB	rgb(23, 61, 160)
HSL	hsl(223, 75%, 36%)
HSV	hsv(223, 86%, 63%)
CMYK	cmyk(85.6%, 61.9%, 0%, 37.3%)
CIE-LAB	lab(29.56, 26.05, -57.12)
CIE-LCH	lch(29.56, 62.77, 294.52°)
OKLab	oklab(40.24% -0.017 -0.1653)
OKLCH	oklch(40.24% 0.166 264.1)
XYZ	xyz(8.3650, 6.0567, 33.9791)
Luminance	0.0606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173DA0 #A07A17

analogous

#1781A0 #173DA0 #3617A0

triadic

#173DA0 #A0173D #3DA017

tetradic

#173DA0 #A01781 #A07A17 #17A036

square

#173DA0 #A01781 #A07A17 #17A036

split-complementary

#173DA0 #A03617 #81A017

monochromatic

#081435 #0F296A #173DA0 #1F51D6 #4C77E5

Accessibility & contrast

On white

9.50

#173DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#173DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173DA0

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173DA0	#FFFFFF	#000000	##FFFFFF
##173DA0	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#003F9E

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #173da0;
/* rgb */ color: rgb(23, 61, 160);
/* oklch */ color: oklch(40.2% 0.166 264.1);

Tailwind

colors: {
  custom: {
    50: '#6f72bd',
    500: '#173da0',
    950: '#000000',
  },
}

SCSS

$custom: #173da0;
$custom-light: #6f72bd;
$custom-dark: #000000;

JSON

{
  "hex": "#173da0",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 160
  },
  "hsl": {
    "h": 223.358,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40238,
    "c": 0.1662,
    "h": 264.1
  },
  "luminance": 0.06058
}

Semantic roles & 50–950 ramp

primary

#173DA0

secondary

#C7A54C

accent

#BE36F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #173DA0

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

Preview Lab → · Contrast checker → · Palette generator →