#173D7C#173D7C

#173D7C is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.116 H 260.0°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#173D7C
RGB	rgb(23, 61, 124)
HSL	hsl(217, 69%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(81.5%, 50.8%, 0%, 51.4%)
CIE-LAB	lab(26.66, 11.36, -39.62)
CIE-LCH	lch(26.66, 41.21, 285.99°)
OKLab	oklab(37.14% -0.02 -0.1139)
OKLCH	oklch(37.14% 0.116 260)
XYZ	xyz(5.6589, 4.9742, 19.7267)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D7C #7C5617

analogous

#17707C #173D7C #24177C

triadic

#173D7C #7C173D #3D7C17

tetradic

#173D7C #7C1770 #7C5617 #177C24

square

#173D7C #7C1770 #7C5617 #177C24

split-complementary

#173D7C #7C2417 #707C17

monochromatic

#050D1A #0D2448 #173D7C #2156B0 #3472D9

Accessibility & contrast

On white

10.53

#173D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D7C

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D7C	#FFFFFF	#000000	##FFFFFF
##173D7C	1.00	10.53	2.00	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18447E

Deuteranopia (green-blind)

#003B7B

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173d7c;
/* rgb */ color: rgb(23, 61, 124);
/* oklch */ color: oklch(37.1% 0.116 260.0);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#173d7c',
    950: '#000000',
  },
}

SCSS

$custom: #173d7c;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173d7c",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 124
  },
  "hsl": {
    "h": 217.426,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37143,
    "c": 0.11566,
    "h": 260
  },
  "luminance": 0.04975
}

Semantic roles & 50–950 ramp

primary

#173D7C

secondary

#B1863E

accent

#AA3CEC

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173D7C

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

Preview Lab → · Contrast checker → · Palette generator →