#173C74#173C74

#173C74 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.105 H 258.7°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#173C74
RGB	rgb(23, 60, 116)
HSL	hsl(216, 67%, 27%)
HSV	hsv(216, 80%, 45%)
CMYK	cmyk(80.2%, 48.3%, 0%, 54.5%)
CIE-LAB	lab(25.79, 8.73, -35.97)
CIE-LCH	lch(25.79, 37.01, 283.64°)
OKLab	oklab(36.29% -0.0205 -0.1032)
OKLCH	oklch(36.29% 0.105 258.7)
XYZ	xyz(5.1204, 4.6742, 17.1520)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C74 #744F17

analogous

#176B74 #173C74 #211774

triadic

#173C74 #74173C #3C7417

tetradic

#173C74 #74176B #744F17 #177421

square

#173C74 #74176B #744F17 #177421

split-complementary

#173C74 #742117 #6B7417

monochromatic

#050D1A #0D2241 #173C74 #2156A7 #3072D6

Accessibility & contrast

On white

10.85

#173C74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173C74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C74

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C74	#FFFFFF	#000000	##FFFFFF
##173C74	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4276

Deuteranopia (green-blind)

#073973

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173c74;
/* rgb */ color: rgb(23, 60, 116);
/* oklch */ color: oklch(36.3% 0.105 258.7);

Tailwind

colors: {
  custom: {
    50: '#63719c',
    500: '#173c74',
    950: '#000000',
  },
}

SCSS

$custom: #173c74;
$custom-light: #63719c;
$custom-dark: #000000;

JSON

{
  "hex": "#173c74",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 116
  },
  "hsl": {
    "h": 216.129,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.36288,
    "c": 0.10522,
    "h": 258.7
  },
  "luminance": 0.04675
}

Semantic roles & 50–950 ramp

primary

#173C74

secondary

#A97E3D

accent

#A53EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C74

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

Preview Lab → · Contrast checker → · Palette generator →