#173A79#173A79

#173A79 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.115 H 261.0°. Best body text is #FFFFFF at 10.95:1 contrast (WCAG AA passes).

Color values

HEX	#173A79
RGB	rgb(23, 58, 121)
HSL	hsl(219, 68%, 28%)
HSV	hsv(219, 81%, 47%)
CMYK	cmyk(81%, 52.1%, 0%, 52.5%)
CIE-LAB	lab(25.53, 12.22, -39.55)
CIE-LCH	lch(25.53, 41.40, 287.17°)
OKLab	oklab(36.21% -0.0179 -0.1138)
OKLCH	oklch(36.21% 0.115 261)
XYZ	xyz(5.3163, 4.5881, 18.6909)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A79 #795617

analogous

#176B79 #173A79 #251779

triadic

#173A79 #79173A #3A7917

tetradic

#173A79 #79176B #795617 #177925

square

#173A79 #79176B #795617 #177925

split-complementary

#173A79 #792517 #6B7917

monochromatic

#050C1A #0D2146 #173A79 #2153AC #326ED8

Accessibility & contrast

On white

10.95

#173A79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173A79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A79

10.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A79	#FFFFFF	#000000	##FFFFFF
##173A79	1.00	10.95	1.92	10.95
#FFFFFF	10.95	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13417B

Deuteranopia (green-blind)

#003878

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173a79;
/* rgb */ color: rgb(23, 58, 121);
/* oklch */ color: oklch(36.2% 0.115 261.0);

Tailwind

colors: {
  custom: {
    50: '#656fa0',
    500: '#173a79',
    950: '#000000',
  },
}

SCSS

$custom: #173a79;
$custom-light: #656fa0;
$custom-dark: #000000;

JSON

{
  "hex": "#173a79",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 121
  },
  "hsl": {
    "h": 218.571,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.36205,
    "c": 0.1152,
    "h": 261
  },
  "luminance": 0.04589
}

Semantic roles & 50–950 ramp

primary

#173A79

secondary

#AE863E

accent

#AD3DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #173A79

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

Preview Lab → · Contrast checker → · Palette generator →