#173D7B#173D7B

#173D7B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.114 H 259.8°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#173D7B
RGB	rgb(23, 61, 123)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 48%)
CMYK	cmyk(81.3%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(26.59, 10.94, -39.10)
CIE-LCH	lch(26.59, 40.60, 285.63°)
OKLab	oklab(37.07% -0.0202 -0.1124)
OKLCH	oklch(37.07% 0.114 259.8)
XYZ	xyz(5.5959, 4.9491, 19.3954)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D7B #7B5517

analogous

#176F7B #173D7B #23177B

triadic

#173D7B #7B173D #3D7B17

tetradic

#173D7B #7B176F #7B5517 #177B23

square

#173D7B #7B176F #7B5517 #177B23

split-complementary

#173D7B #7B2317 #6F7B17

monochromatic

#050D1A #0D2347 #173D7B #2157AF #3372D9

Accessibility & contrast

On white

10.55

#173D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D7B

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D7B	#FFFFFF	#000000	##FFFFFF
##173D7B	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19447D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173d7b;
/* rgb */ color: rgb(23, 61, 123);
/* oklch */ color: oklch(37.1% 0.114 259.8);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#173d7b',
    950: '#000000',
  },
}

SCSS

$custom: #173d7b;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173d7b",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 217.2,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.37065,
    "c": 0.1142,
    "h": 259.8
  },
  "luminance": 0.0495
}

Semantic roles & 50–950 ramp

primary

#173D7B

secondary

#B0853E

accent

#A93CEB

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #173D7B

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

Preview Lab → · Contrast checker → · Palette generator →