#173C7D#173C7D

#173C7D is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.118 H 260.8°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#173C7D
RGB	rgb(23, 60, 125)
HSL	hsl(218, 69%, 29%)
HSV	hsv(218, 82%, 49%)
CMYK	cmyk(81.6%, 52%, 0%, 51%)
CIE-LAB	lab(26.43, 12.47, -40.62)
CIE-LCH	lch(26.43, 42.49, 287.07°)
OKLab	oklab(36.99% -0.019 -0.1169)
OKLCH	oklch(36.99% 0.118 260.8)
XYZ	xyz(5.6695, 4.8939, 20.0439)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7D #7D5817

analogous

#176F7D #173C7D #25177D

triadic

#173C7D #7D173C #3C7D17

tetradic

#173C7D #7D176F #7D5817 #177D25

square

#173C7D #7D176F #7D5817 #177D25

split-complementary

#173C7D #7D2517 #6F7D17

monochromatic

#050C1A #0D2349 #173C7D #2155B1 #3571DA

Accessibility & contrast

On white

10.61

#173C7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173C7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7D

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7D	#FFFFFF	#000000	##FFFFFF
##173C7D	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14437F

Deuteranopia (green-blind)

#003A7C

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173c7d;
/* rgb */ color: rgb(23, 60, 125);
/* oklch */ color: oklch(37.0% 0.118 260.8);

Tailwind

colors: {
  custom: {
    50: '#6671a3',
    500: '#173c7d',
    950: '#000000',
  },
}

SCSS

$custom: #173c7d;
$custom-light: #6671a3;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7d",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 125
  },
  "hsl": {
    "h": 218.235,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.3699,
    "c": 0.11842,
    "h": 260.8
  },
  "luminance": 0.04895
}

Semantic roles & 50–950 ramp

primary

#173C7D

secondary

#B2883E

accent

#AC3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C7D

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

Preview Lab → · Contrast checker → · Palette generator →