#173F82#173F82

#173F82 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.122 H 260.2°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#173F82
RGB	rgb(23, 63, 130)
HSL	hsl(218, 70%, 30%)
HSV	hsv(218, 82%, 51%)
CMYK	cmyk(82.3%, 51.5%, 0%, 49%)
CIE-LAB	lab(27.70, 12.45, -41.69)
CIE-LCH	lch(27.70, 43.51, 286.62°)
OKLab	oklab(38.08% -0.0207 -0.12)
OKLCH	oklch(38.08% 0.122 260.2)
XYZ	xyz(6.1587, 5.3481, 21.8225)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F82 #825A17

analogous

#177582 #173F82 #241782

triadic

#173F82 #82173F #3F8217

tetradic

#173F82 #821775 #825A17 #178224

square

#173F82 #821775 #825A17 #178224

split-complementary

#173F82 #822417 #758217

monochromatic

#050D1A #0E264E #173F82 #2058B6 #3875DC

Accessibility & contrast

On white

10.15

#173F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#173F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F82

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F82	#FFFFFF	#000000	##FFFFFF
##173F82	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164784

Deuteranopia (green-blind)

#003D81

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173f82;
/* rgb */ color: rgb(23, 63, 130);
/* oklch */ color: oklch(38.1% 0.122 260.2);

Tailwind

colors: {
  custom: {
    50: '#6773a7',
    500: '#173f82',
    950: '#000000',
  },
}

SCSS

$custom: #173f82;
$custom-light: #6773a7;
$custom-dark: #000000;

JSON

{
  "hex": "#173f82",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 130
  },
  "hsl": {
    "h": 217.57,
    "s": 69.935,
    "l": 30
  },
  "oklch": {
    "l": 0.38082,
    "c": 0.12175,
    "h": 260.2
  },
  "luminance": 0.05349
}

Semantic roles & 50–950 ramp

primary

#173F82

secondary

#B68A3E

accent

#AA3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #173F82

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

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