#173D7A#173D7A

#173D7A is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.113 H 259.6°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#173D7A
RGB	rgb(23, 61, 122)
HSL	hsl(217, 68%, 28%)
HSV	hsv(217, 81%, 48%)
CMYK	cmyk(81.1%, 50%, 0%, 52.2%)
CIE-LAB	lab(26.52, 10.52, -38.59)
CIE-LCH	lch(26.52, 40.00, 285.26°)
OKLab	oklab(36.99% -0.0203 -0.1109)
OKLCH	oklch(36.99% 0.113 259.6)
XYZ	xyz(5.5337, 4.9241, 19.0674)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D7A #7A5417

analogous

#176E7A #173D7A #22177A

triadic

#173D7A #7A173D #3D7A17

tetradic

#173D7A #7A176E #7A5417 #177A22

square

#173D7A #7A176E #7A5417 #177A22

split-complementary

#173D7A #7A2217 #6E7A17

monochromatic

#050D1A #0D2347 #173D7A #2157AD #3372D9

Accessibility & contrast

On white

10.58

#173D7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173D7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D7A

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D7A	#FFFFFF	#000000	##FFFFFF
##173D7A	1.00	10.58	1.99	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447C

Deuteranopia (green-blind)

#003A79

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173d7a;
/* rgb */ color: rgb(23, 61, 122);
/* oklch */ color: oklch(37.0% 0.113 259.6);

Tailwind

colors: {
  custom: {
    50: '#6571a1',
    500: '#173d7a',
    950: '#000000',
  },
}

SCSS

$custom: #173d7a;
$custom-light: #6571a1;
$custom-dark: #000000;

JSON

{
  "hex": "#173d7a",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 122
  },
  "hsl": {
    "h": 216.97,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36987,
    "c": 0.11273,
    "h": 259.6
  },
  "luminance": 0.04925
}

Semantic roles & 50–950 ramp

primary

#173D7A

secondary

#AF843E

accent

#A83DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #173D7A

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

Preview Lab → · Contrast checker → · Palette generator →