#173A7A#173A7A

#173A7A is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.3% C 0.117 H 261.2°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#173A7A
RGB	rgb(23, 58, 122)
HSL	hsl(219, 68%, 28%)
HSV	hsv(219, 81%, 48%)
CMYK	cmyk(81.1%, 52.5%, 0%, 52.2%)
CIE-LAB	lab(25.60, 12.64, -40.07)
CIE-LCH	lch(25.60, 42.01, 287.50°)
OKLab	oklab(36.29% -0.0178 -0.1153)
OKLCH	oklch(36.29% 0.117 261.2)
XYZ	xyz(5.3780, 4.6128, 19.0155)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A7A #7A5717

analogous

#176B7A #173A7A #25177A

triadic

#173A7A #7A173A #3A7A17

tetradic

#173A7A #7A176B #7A5717 #177A25

square

#173A7A #7A176B #7A5717 #177A25

split-complementary

#173A7A #7A2517 #6B7A17

monochromatic

#050C1A #0D2247 #173A7A #2152AD #336DD9

Accessibility & contrast

On white

10.92

#173A7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173A7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A7A

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A7A	#FFFFFF	#000000	##FFFFFF
##173A7A	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12417C

Deuteranopia (green-blind)

#003879

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173a7a;
/* rgb */ color: rgb(23, 58, 122);
/* oklch */ color: oklch(36.3% 0.117 261.2);

Tailwind

colors: {
  custom: {
    50: '#656fa1',
    500: '#173a7a',
    950: '#000000',
  },
}

SCSS

$custom: #173a7a;
$custom-light: #656fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#173a7a",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 122
  },
  "hsl": {
    "h": 218.788,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36285,
    "c": 0.11667,
    "h": 261.2
  },
  "luminance": 0.04613
}

Semantic roles & 50–950 ramp

primary

#173A7A

secondary

#AF873E

accent

#AD3DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #173A7A

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

Preview Lab → · Contrast checker → · Palette generator →