#173E8D#173E8D

#173E8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.139 H 262.3°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#173E8D
RGB	rgb(23, 62, 141)
HSL	hsl(220, 72%, 32%)
HSV	hsv(220, 84%, 55%)
CMYK	cmyk(83.7%, 56%, 0%, 44.7%)
CIE-LAB	lab(28.25, 17.68, -47.64)
CIE-LCH	lch(28.25, 50.81, 290.36°)
OKLab	oklab(38.76% -0.0187 -0.1375)
OKLCH	oklch(38.76% 0.139 262.3)
XYZ	xyz(6.8820, 5.5497, 25.9026)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E8D #8D6617

analogous

#17798D #173E8D #2B178D

triadic

#173E8D #8D173E #3E8D17

tetradic

#173E8D #8D1779 #8D6617 #178D2B

square

#173E8D #8D1779 #8D6617 #178D2B

split-complementary

#173E8D #8D2B17 #798D17

monochromatic

#061024 #0E2758 #173E8D #2055C2 #3F74E0

Accessibility & contrast

On white

9.95

#173E8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#173E8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E8D

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E8D	#FFFFFF	#000000	##FFFFFF
##173E8D	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #173e8d;
/* rgb */ color: rgb(23, 62, 141);
/* oklch */ color: oklch(38.8% 0.139 262.3);

Tailwind

colors: {
  custom: {
    50: '#6a72af',
    500: '#173e8d',
    950: '#000000',
  },
}

SCSS

$custom: #173e8d;
$custom-light: #6a72af;
$custom-dark: #000000;

JSON

{
  "hex": "#173e8d",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 141
  },
  "hsl": {
    "h": 220.169,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.3876,
    "c": 0.13875,
    "h": 262.3
  },
  "luminance": 0.0555
}

Semantic roles & 50–950 ramp

primary

#173E8D

secondary

#C09640

accent

#B339EF

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #173E8D

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

Preview Lab → · Contrast checker → · Palette generator →