#173A75#173A75

#173A75 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.9% C 0.109 H 260.2°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#173A75
RGB	rgb(23, 58, 117)
HSL	hsl(218, 67%, 27%)
HSV	hsv(218, 80%, 46%)
CMYK	cmyk(80.3%, 50.4%, 0%, 54.1%)
CIE-LAB	lab(25.24, 10.55, -37.49)
CIE-LCH	lch(25.24, 38.95, 285.72°)
OKLab	oklab(35.89% -0.0186 -0.1077)
OKLCH	oklch(35.89% 0.109 260.2)
XYZ	xyz(5.0761, 4.4920, 17.4257)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A75 #755217

analogous

#176975 #173A75 #231775

triadic

#173A75 #75173A #3A7517

tetradic

#173A75 #751769 #755217 #177523

square

#173A75 #751769 #755217 #177523

split-complementary

#173A75 #752317 #697517

monochromatic

#050D1A #0D2142 #173A75 #2153A8 #306ED6

Accessibility & contrast

On white

11.06

#173A75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173A75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A75

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A75	#FFFFFF	#000000	##FFFFFF
##173A75	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184077

Deuteranopia (green-blind)

#003874

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173a75;
/* rgb */ color: rgb(23, 58, 117);
/* oklch */ color: oklch(35.9% 0.109 260.2);

Tailwind

colors: {
  custom: {
    50: '#646f9d',
    500: '#173a75',
    950: '#000000',
  },
}

SCSS

$custom: #173a75;
$custom-light: #646f9d;
$custom-dark: #000000;

JSON

{
  "hex": "#173a75",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 117
  },
  "hsl": {
    "h": 217.66,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.35888,
    "c": 0.10931,
    "h": 260.2
  },
  "luminance": 0.04493
}

Semantic roles & 50–950 ramp

primary

#173A75

secondary

#AA823D

accent

#AA3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A75

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

Preview Lab → · Contrast checker → · Palette generator →