#173B57#173B57

#173B57 is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.1% C 0.064 H 244.9°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#173B57
RGB	rgb(23, 59, 87)
HSL	hsl(206, 58%, 22%)
HSV	hsv(206, 74%, 34%)
CMYK	cmyk(73.6%, 32.2%, 0%, 65.9%)
CIE-LAB	lab(23.66, -2.48, -20.61)
CIE-LCH	lch(23.66, 20.76, 263.15°)
OKLab	oklab(34.05% -0.0273 -0.0582)
OKLCH	oklch(34.05% 0.064 244.9)
XYZ	xyz(3.6370, 3.9978, 9.5950)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B57 #573317

analogous

#175753 #173B57 #171B57

triadic

#173B57 #57173B #3B5717

tetradic

#173B57 #531757 #573317 #1B5717

square

#173B57 #531757 #573317 #1B5717

split-complementary

#173B57 #57171B #575317

monochromatic

#061018 #0A1A27 #173B57 #245C87 #317DB8

Accessibility & contrast

On white

11.67

#173B57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#173B57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B57

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B57	#FFFFFF	#000000	##FFFFFF
##173B57	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3C58

Deuteranopia (green-blind)

#263656

Tritanopia (blue-blind)

#004245

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b57;
/* rgb */ color: rgb(23, 59, 87);
/* oklch */ color: oklch(34.1% 0.064 244.9);

Tailwind

colors: {
  custom: {
    50: '#5d7086',
    500: '#173b57',
    950: '#000000',
  },
}

SCSS

$custom: #173b57;
$custom-light: #5d7086;
$custom-dark: #000000;

JSON

{
  "hex": "#173b57",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 87
  },
  "hsl": {
    "h": 206.25,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.34051,
    "c": 0.06431,
    "h": 244.9
  },
  "luminance": 0.03998
}

Semantic roles & 50–950 ramp

primary

#173B57

secondary

#8E603C

accent

#8A46E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173B57

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

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