#173D79#173D79

#173D79 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.111 H 259.4°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#173D79
RGB	rgb(23, 61, 121)
HSL	hsl(217, 68%, 28%)
HSV	hsv(217, 81%, 47%)
CMYK	cmyk(81%, 49.6%, 0%, 52.5%)
CIE-LAB	lab(26.45, 10.11, -38.07)
CIE-LCH	lch(26.45, 39.39, 284.87°)
OKLab	oklab(36.91% -0.0205 -0.1094)
OKLCH	oklch(36.91% 0.111 259.4)
XYZ	xyz(5.4720, 4.8995, 18.7428)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D79 #795317

analogous

#176E79 #173D79 #221779

triadic

#173D79 #79173D #3D7917

tetradic

#173D79 #79176E #795317 #177922

square

#173D79 #79176E #795317 #177922

split-complementary

#173D79 #792217 #6E7917

monochromatic

#050D1A #0D2346 #173D79 #2157AC #3273D8

Accessibility & contrast

On white

10.61

#173D79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173D79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D79

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D79	#FFFFFF	#000000	##FFFFFF
##173D79	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)

#1B437B

Deuteranopia (green-blind)

#003A78

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173d79;
/* rgb */ color: rgb(23, 61, 121);
/* oklch */ color: oklch(36.9% 0.111 259.4);

Tailwind

colors: {
  custom: {
    50: '#6571a0',
    500: '#173d79',
    950: '#000000',
  },
}

SCSS

$custom: #173d79;
$custom-light: #6571a0;
$custom-dark: #000000;

JSON

{
  "hex": "#173d79",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 121
  },
  "hsl": {
    "h": 216.735,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.3691,
    "c": 0.11128,
    "h": 259.4
  },
  "luminance": 0.049
}

Semantic roles & 50–950 ramp

primary

#173D79

secondary

#AE833E

accent

#A73DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #173D79

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

Preview Lab → · Contrast checker → · Palette generator →