#173957#173957

#173957 is a dark, moderate cyan. Relative luminance 0.038; OKLCH L 33.5% C 0.066 H 247.9°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#173957
RGB	rgb(23, 57, 87)
HSL	hsl(208, 58%, 22%)
HSV	hsv(208, 74%, 34%)
CMYK	cmyk(73.6%, 34.5%, 0%, 65.9%)
CIE-LAB	lab(22.99, -1.13, -21.68)
CIE-LCH	lch(22.99, 21.71, 267.03°)
OKLab	oklab(33.52% -0.025 -0.0614)
OKLCH	oklch(33.52% 0.066 247.9)
XYZ	xyz(3.5361, 3.7962, 9.5613)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173957 #573517

analogous

#175755 #173957 #171957

triadic

#173957 #571739 #395717

tetradic

#173957 #551757 #573517 #195717

square

#173957 #551757 #573517 #195717

split-complementary

#173957 #571719 #575517

monochromatic

#061018 #0A1927 #173957 #245987 #3178B8

Accessibility & contrast

On white

11.94

#173957 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#173957 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173957

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173957	#FFFFFF	#000000	##FFFFFF
##173957	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3A58

Deuteranopia (green-blind)

#233456

Tritanopia (blue-blind)

#004044

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173957;
/* rgb */ color: rgb(23, 57, 87);
/* oklch */ color: oklch(33.5% 0.066 247.9);

Tailwind

colors: {
  custom: {
    50: '#5d6f86',
    500: '#173957',
    950: '#000000',
  },
}

SCSS

$custom: #173957;
$custom-light: #5d6f86;
$custom-dark: #000000;

JSON

{
  "hex": "#173957",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 87
  },
  "hsl": {
    "h": 208.125,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.33516,
    "c": 0.06624,
    "h": 247.9
  },
  "luminance": 0.03797
}

Semantic roles & 50–950 ramp

primary

#173957

secondary

#8E623C

accent

#8F46E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173957

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

Preview Lab → · Contrast checker → · Palette generator →