#173E7A#173E7A

#173E7A is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.111 H 259.0°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#173E7A
RGB	rgb(23, 62, 122)
HSL	hsl(216, 68%, 28%)
HSV	hsv(216, 81%, 48%)
CMYK	cmyk(81.1%, 49.2%, 0%, 52.2%)
CIE-LAB	lab(26.83, 9.82, -38.09)
CIE-LCH	lch(26.83, 39.34, 284.46°)
OKLab	oklab(37.22% -0.0212 -0.1094)
OKLCH	oklch(37.22% 0.111 259)
XYZ	xyz(5.5875, 5.0319, 19.0853)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E7A #7A5317

analogous

#176F7A #173E7A #22177A

triadic

#173E7A #7A173E #3E7A17

tetradic

#173E7A #7A176F #7A5317 #177A22

square

#173E7A #7A176F #7A5317 #177A22

split-complementary

#173E7A #7A2217 #6F7A17

monochromatic

#050D1A #0D2447 #173E7A #2158AD #3374D9

Accessibility & contrast

On white

10.47

#173E7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173E7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E7A

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E7A	#FFFFFF	#000000	##FFFFFF
##173E7A	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D447C

Deuteranopia (green-blind)

#013B79

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173e7a;
/* rgb */ color: rgb(23, 62, 122);
/* oklch */ color: oklch(37.2% 0.111 259.0);

Tailwind

colors: {
  custom: {
    50: '#6572a1',
    500: '#173e7a',
    950: '#000000',
  },
}

SCSS

$custom: #173e7a;
$custom-light: #6572a1;
$custom-dark: #000000;

JSON

{
  "hex": "#173e7a",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 122
  },
  "hsl": {
    "h": 216.364,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.37224,
    "c": 0.11144,
    "h": 259
  },
  "luminance": 0.05033
}

Semantic roles & 50–950 ramp

primary

#173E7A

secondary

#AF823E

accent

#A63DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080F

muted

#7A7B7E

Preview Lab

Preview with #173E7A

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

Preview Lab → · Contrast checker → · Palette generator →