#173B4E#173B4E

#173B4E is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.5% C 0.053 H 234.5°. Best body text is #FFFFFF at 11.85:1 contrast (WCAG AA passes).

Color values

HEX	#173B4E
RGB	rgb(23, 59, 78)
HSL	hsl(201, 54%, 20%)
HSV	hsv(201, 71%, 31%)
CMYK	cmyk(70.5%, 24.4%, 0%, 69.4%)
CIE-LAB	lab(23.20, -5.99, -15.39)
CIE-LCH	lch(23.20, 16.52, 248.72°)
OKLab	oklab(33.53% -0.0308 -0.0431)
OKLCH	oklch(33.53% 0.053 234.5)
XYZ	xyz(3.2919, 3.8598, 7.7778)
Luminance	0.0386 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B4E #4E2A17

analogous

#174E45 #173B4E #17204E

triadic

#173B4E #4E173B #3B4E17

tetradic

#173B4E #45174E #4E2A17 #204E17

square

#173B4E #45174E #4E2A17 #204E17

split-complementary

#173B4E #4E1720 #4E4517

monochromatic

#071218 #09171F #173B4E #255F7D #3383AD

Accessibility & contrast

On white

11.85

#173B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#173B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B4E

11.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B4E	#FFFFFF	#000000	##FFFFFF
##173B4E	1.00	11.85	1.77	11.85
#FFFFFF	11.85	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323A4F

Deuteranopia (green-blind)

#2A354E

Tritanopia (blue-blind)

#004041

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173b4e;
/* rgb */ color: rgb(23, 59, 78);
/* oklch */ color: oklch(33.5% 0.053 234.5);

Tailwind

colors: {
  custom: {
    50: '#5b707f',
    500: '#173b4e',
    950: '#000000',
  },
}

SCSS

$custom: #173b4e;
$custom-light: #5b707f;
$custom-dark: #000000;

JSON

{
  "hex": "#173b4e",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 78
  },
  "hsl": {
    "h": 200.727,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.33533,
    "c": 0.05299,
    "h": 234.5
  },
  "luminance": 0.0386
}

Semantic roles & 50–950 ramp

primary

#173B4E

secondary

#85553C

accent

#7D4ADE

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173B4E

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

Preview Lab → · Contrast checker → · Palette generator →