#173F71#173F71

#173F71 is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.8% C 0.097 H 255.7°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#173F71
RGB	rgb(23, 63, 113)
HSL	hsl(213, 66%, 27%)
HSV	hsv(213, 80%, 44%)
CMYK	cmyk(79.6%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(26.53, 5.39, -32.87)
CIE-LCH	lch(26.53, 33.31, 279.32°)
OKLab	oklab(36.8% -0.024 -0.094)
OKLCH	oklch(36.8% 0.097 255.7)
XYZ	xyz(5.1104, 4.9288, 16.3016)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F71 #714917

analogous

#176C71 #173F71 #1C1771

triadic

#173F71 #71173F #3F7117

tetradic

#173F71 #71176C #714917 #17711C

square

#173F71 #71176C #714917 #17711C

split-complementary

#173F71 #711C17 #6C7117

monochromatic

#050E19 #0D233E #173F71 #215BA4 #2E78D4

Accessibility & contrast

On white

10.58

#173F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F71

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F71	#FFFFFF	#000000	##FFFFFF
##173F71	1.00	10.58	1.99	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264373

Deuteranopia (green-blind)

#163B70

Tritanopia (blue-blind)

#004B52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173f71;
/* rgb */ color: rgb(23, 63, 113);
/* oklch */ color: oklch(36.8% 0.097 255.7);

Tailwind

colors: {
  custom: {
    50: '#63739a',
    500: '#173f71',
    950: '#000000',
  },
}

SCSS

$custom: #173f71;
$custom-light: #63739a;
$custom-dark: #000000;

JSON

{
  "hex": "#173f71",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 213.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.368,
    "c": 0.09703,
    "h": 255.7
  },
  "luminance": 0.04929
}

Semantic roles & 50–950 ramp

primary

#173F71

secondary

#A7783D

accent

#9D3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F71

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

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