#173D57#173D57

#173D57 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.063 H 241.7°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#173D57
RGB	rgb(23, 61, 87)
HSL	hsl(204, 58%, 22%)
HSV	hsv(204, 74%, 34%)
CMYK	cmyk(73.6%, 29.9%, 0%, 65.9%)
CIE-LAB	lab(24.35, -3.81, -19.55)
CIE-LCH	lch(24.35, 19.92, 258.96°)
OKLab	oklab(34.59% -0.0296 -0.0551)
OKLCH	oklch(34.59% 0.063 241.7)
XYZ	xyz(3.7417, 4.2074, 9.6299)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D57 #573117

analogous

#175751 #173D57 #171D57

triadic

#173D57 #57173D #3D5717

tetradic

#173D57 #511757 #573117 #1D5717

square

#173D57 #511757 #573117 #1D5717

split-complementary

#173D57 #57171D #575117

monochromatic

#061118 #0A1B27 #173D57 #245F87 #3181B8

Accessibility & contrast

On white

11.40

#173D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D57

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D57	#FFFFFF	#000000	##FFFFFF
##173D57	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313D58

Deuteranopia (green-blind)

#283757

Tritanopia (blue-blind)

#004346

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173d57;
/* rgb */ color: rgb(23, 61, 87);
/* oklch */ color: oklch(34.6% 0.063 241.7);

Tailwind

colors: {
  custom: {
    50: '#5d7286',
    500: '#173d57',
    950: '#000000',
  },
}

SCSS

$custom: #173d57;
$custom-light: #5d7286;
$custom-dark: #000000;

JSON

{
  "hex": "#173d57",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 87
  },
  "hsl": {
    "h": 204.375,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.34589,
    "c": 0.06259,
    "h": 241.7
  },
  "luminance": 0.04208
}

Semantic roles & 50–950 ramp

primary

#173D57

secondary

#8E5D3C

accent

#8546E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173D57

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

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