#173F4B#173F4B

#173F4B is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.5% C 0.049 H 220.7°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#173F4B
RGB	rgb(23, 63, 75)
HSL	hsl(194, 53%, 19%)
HSV	hsv(194, 69%, 29%)
CMYK	cmyk(69.3%, 16%, 0%, 70.6%)
CIE-LAB	lab(24.46, -9.67, -11.46)
CIE-LCH	lch(24.46, 15.00, 229.87°)
OKLab	oklab(34.49% -0.0371 -0.0319)
OKLCH	oklch(34.49% 0.049 220.7)
XYZ	xyz(3.4003, 4.2448, 7.2954)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F4B #4B2317

analogous

#174B3D #173F4B #17254B

triadic

#173F4B #4B173F #3F4B17

tetradic

#173F4B #3D174B #4B2317 #254B17

square

#173F4B #3D174B #4B2317 #254B17

split-complementary

#173F4B #4B1725 #4B3D17

monochromatic

#071417 #09181C #173F4B #25667A #348EA9

Accessibility & contrast

On white

11.36

#173F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F4B

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F4B	#FFFFFF	#000000	##FFFFFF
##173F4B	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#383D4C

Deuteranopia (green-blind)

#30384B

Tritanopia (blue-blind)

#004343

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173f4b;
/* rgb */ color: rgb(23, 63, 75);
/* oklch */ color: oklch(34.5% 0.049 220.7);

Tailwind

colors: {
  custom: {
    50: '#5b747d',
    500: '#173f4b',
    950: '#000000',
  },
}

SCSS

$custom: #173f4b;
$custom-light: #5b747d;
$custom-dark: #000000;

JSON

{
  "hex": "#173f4b",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 75
  },
  "hsl": {
    "h": 193.846,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.34495,
    "c": 0.04893,
    "h": 220.7
  },
  "luminance": 0.04245
}

Semantic roles & 50–950 ramp

primary

#173F4B

secondary

#824C3C

accent

#6D4BDC

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #173F4B

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

Preview Lab → · Contrast checker → · Palette generator →