#173C7F#173C7F

#173C7F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.121 H 261.1°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#173C7F
RGB	rgb(23, 60, 127)
HSL	hsl(219, 69%, 29%)
HSV	hsv(219, 82%, 50%)
CMYK	cmyk(81.9%, 52.8%, 0%, 50.2%)
CIE-LAB	lab(26.58, 13.30, -41.63)
CIE-LCH	lch(26.58, 43.71, 287.72°)
OKLab	oklab(37.15% -0.0187 -0.1199)
OKLCH	oklch(37.15% 0.121 261.1)
XYZ	xyz(5.7986, 4.9455, 20.7235)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7F #7F5A17

analogous

#17707F #173C7F #26177F

triadic

#173C7F #7F173C #3C7F17

tetradic

#173C7F #7F1770 #7F5A17 #177F26

square

#173C7F #7F1770 #7F5A17 #177F26

split-complementary

#173C7F #7F2617 #707F17

monochromatic

#050C1A #0E244B #173C7F #2054B3 #3670DB

Accessibility & contrast

On white

10.56

#173C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7F

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7F	#FFFFFF	#000000	##FFFFFF
##173C7F	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104481

Deuteranopia (green-blind)

#003A7E

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173c7f;
/* rgb */ color: rgb(23, 60, 127);
/* oklch */ color: oklch(37.2% 0.121 261.1);

Tailwind

colors: {
  custom: {
    50: '#6671a5',
    500: '#173c7f',
    950: '#000000',
  },
}

SCSS

$custom: #173c7f;
$custom-light: #6671a5;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7f",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 127
  },
  "hsl": {
    "h": 218.654,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37151,
    "c": 0.12132,
    "h": 261.1
  },
  "luminance": 0.04946
}

Semantic roles & 50–950 ramp

primary

#173C7F

secondary

#B48A3E

accent

#AD3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C7F

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

Preview Lab → · Contrast checker → · Palette generator →