#173C71#173C71

#173C71 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.101 H 257.9°. Best body text is #FFFFFF at 10.93:1 contrast (WCAG AA passes).

Color values

HEX	#173C71
RGB	rgb(23, 60, 113)
HSL	hsl(215, 66%, 27%)
HSV	hsv(215, 80%, 44%)
CMYK	cmyk(79.6%, 46.9%, 0%, 55.7%)
CIE-LAB	lab(25.58, 7.48, -34.39)
CIE-LCH	lch(25.58, 35.20, 282.27°)
OKLab	oklab(36.06% -0.0211 -0.0986)
OKLCH	oklch(36.06% 0.101 257.9)
XYZ	xyz(4.9488, 4.6056, 16.2477)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C71 #714C17

analogous

#176971 #173C71 #1F1771

triadic

#173C71 #71173C #3C7117

tetradic

#173C71 #711769 #714C17 #17711F

square

#173C71 #711769 #714C17 #17711F

split-complementary

#173C71 #711F17 #697117

monochromatic

#050E19 #0D213E #173C71 #2157A4 #2E72D4

Accessibility & contrast

On white

10.93

#173C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C71

10.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C71	#FFFFFF	#000000	##FFFFFF
##173C71	1.00	10.93	1.92	10.93
#FFFFFF	10.93	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214173

Deuteranopia (green-blind)

#0E3970

Tritanopia (blue-blind)

#004951

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173c71;
/* rgb */ color: rgb(23, 60, 113);
/* oklch */ color: oklch(36.1% 0.101 257.9);

Tailwind

colors: {
  custom: {
    50: '#63719a',
    500: '#173c71',
    950: '#000000',
  },
}

SCSS

$custom: #173c71;
$custom-light: #63719a;
$custom-dark: #000000;

JSON

{
  "hex": "#173c71",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 113
  },
  "hsl": {
    "h": 215.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.36064,
    "c": 0.1008,
    "h": 257.9
  },
  "luminance": 0.04606
}

Semantic roles & 50–950 ramp

primary

#173C71

secondary

#A77B3D

accent

#A33FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C71

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

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