#173C7A#173C7A

#173C7A is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.114 H 260.2°. Best body text is #FFFFFF at 10.69:1 contrast (WCAG AA passes).

Color values

HEX	#173C7A
RGB	rgb(23, 60, 122)
HSL	hsl(218, 68%, 28%)
HSV	hsv(218, 81%, 48%)
CMYK	cmyk(81.1%, 50.8%, 0%, 52.2%)
CIE-LAB	lab(26.21, 11.23, -39.08)
CIE-LCH	lch(26.21, 40.66, 286.03°)
OKLab	oklab(36.75% -0.0195 -0.1124)
OKLCH	oklch(36.75% 0.114 260.2)
XYZ	xyz(5.4808, 4.8184, 19.0498)
Luminance	0.0482 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7A #7A5517

analogous

#176D7A #173C7A #23177A

triadic

#173C7A #7A173C #3C7A17

tetradic

#173C7A #7A176D #7A5517 #177A23

square

#173C7A #7A176D #7A5517 #177A23

split-complementary

#173C7A #7A2317 #6D7A17

monochromatic

#050D1A #0D2347 #173C7A #2155AD #3371D9

Accessibility & contrast

On white

10.69

#173C7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173C7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7A

10.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7A	#FFFFFF	#000000	##FFFFFF
##173C7A	1.00	10.69	1.96	10.69
#FFFFFF	10.69	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18437C

Deuteranopia (green-blind)

#003A79

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173c7a;
/* rgb */ color: rgb(23, 60, 122);
/* oklch */ color: oklch(36.8% 0.114 260.2);

Tailwind

colors: {
  custom: {
    50: '#6571a1',
    500: '#173c7a',
    950: '#000000',
  },
}

SCSS

$custom: #173c7a;
$custom-light: #6571a1;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7a",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 122
  },
  "hsl": {
    "h": 217.576,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36752,
    "c": 0.11404,
    "h": 260.2
  },
  "luminance": 0.04819
}

Semantic roles & 50–950 ramp

primary

#173C7A

secondary

#AF853E

accent

#AA3DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #173C7A

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

Preview Lab → · Contrast checker → · Palette generator →