#173C70#173C70

#173C70 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.0% C 0.099 H 257.6°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#173C70
RGB	rgb(23, 60, 112)
HSL	hsl(215, 66%, 26%)
HSV	hsv(215, 79%, 44%)
CMYK	cmyk(79.5%, 46.4%, 0%, 56.1%)
CIE-LAB	lab(25.51, 7.06, -33.86)
CIE-LCH	lch(25.51, 34.59, 281.78°)
OKLab	oklab(35.99% -0.0213 -0.097)
OKLCH	oklch(35.99% 0.099 257.6)
XYZ	xyz(4.8928, 4.5832, 15.9529)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C70 #704B17

analogous

#176970 #173C70 #1F1770

triadic

#173C70 #70173C #3C7017

tetradic

#173C70 #701769 #704B17 #17701F

square

#173C70 #701769 #704B17 #17701F

split-complementary

#173C70 #701F17 #697017

monochromatic

#050E19 #0D213D #173C70 #2157A3 #2D73D4

Accessibility & contrast

On white

10.96

#173C70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173C70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C70

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C70	#FFFFFF	#000000	##FFFFFF
##173C70	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224172

Deuteranopia (green-blind)

#10396F

Tritanopia (blue-blind)

#004850

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173c70;
/* rgb */ color: rgb(23, 60, 112);
/* oklch */ color: oklch(36.0% 0.099 257.6);

Tailwind

colors: {
  custom: {
    50: '#627199',
    500: '#173c70',
    950: '#000000',
  },
}

SCSS

$custom: #173c70;
$custom-light: #627199;
$custom-dark: #000000;

JSON

{
  "hex": "#173c70",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 112
  },
  "hsl": {
    "h": 215.056,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.3599,
    "c": 0.09932,
    "h": 257.6
  },
  "luminance": 0.04584
}

Semantic roles & 50–950 ramp

primary

#173C70

secondary

#A67A3D

accent

#A23FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C70

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

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