#173A7E#173A7E

#173A7E is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.6% C 0.122 H 261.9°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#173A7E
RGB	rgb(23, 58, 126)
HSL	hsl(220, 69%, 29%)
HSV	hsv(220, 82%, 49%)
CMYK	cmyk(81.7%, 54%, 0%, 50.6%)
CIE-LAB	lab(25.90, 14.30, -42.10)
CIE-LCH	lch(25.90, 44.46, 288.76°)
OKLab	oklab(36.61% -0.0173 -0.1213)
OKLCH	oklch(36.61% 0.122 261.9)
XYZ	xyz(5.6309, 4.7140, 20.3477)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A7E #7E5B17

analogous

#176E7E #173A7E #28177E

triadic

#173A7E #7E173A #3A7E17

tetradic

#173A7E #7E176E #7E5B17 #177E28

square

#173A7E #7E176E #7E5B17 #177E28

split-complementary

#173A7E #7E2817 #6E7E17

monochromatic

#050C1A #0E224A #173A7E #2052B2 #356DDA

Accessibility & contrast

On white

10.81

#173A7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173A7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A7E

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A7E	#FFFFFF	#000000	##FFFFFF
##173A7E	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4280

Deuteranopia (green-blind)

#00397D

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173a7e;
/* rgb */ color: rgb(23, 58, 126);
/* oklch */ color: oklch(36.6% 0.122 261.9);

Tailwind

colors: {
  custom: {
    50: '#666fa4',
    500: '#173a7e',
    950: '#000000',
  },
}

SCSS

$custom: #173a7e;
$custom-light: #666fa4;
$custom-dark: #000000;

JSON

{
  "hex": "#173a7e",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 126
  },
  "hsl": {
    "h": 219.612,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36612,
    "c": 0.12249,
    "h": 261.9
  },
  "luminance": 0.04715
}

Semantic roles & 50–950 ramp

primary

#173A7E

secondary

#B38B3E

accent

#B03CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173A7E

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

Preview Lab → · Contrast checker → · Palette generator →