#173B6C#173B6C

#173B6C is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.5% C 0.095 H 257.0°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#173B6C
RGB	rgb(23, 59, 108)
HSL	hsl(215, 65%, 26%)
HSV	hsv(215, 79%, 42%)
CMYK	cmyk(78.7%, 45.4%, 0%, 57.6%)
CIE-LAB	lab(24.93, 6.10, -32.24)
CIE-LCH	lch(24.93, 32.81, 280.72°)
OKLab	oklab(35.45% -0.0213 -0.0922)
OKLCH	oklch(35.45% 0.095 257)
XYZ	xyz(4.6231, 4.3923, 14.7886)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B6C #6C4817

analogous

#17656C #173B6C #1D176C

triadic

#173B6C #6C173B #3B6C17

tetradic

#173B6C #6C1765 #6C4817 #176C1D

square

#173B6C #6C1765 #6C4817 #176C1D

split-complementary

#173B6C #6C1D17 #656C17

monochromatic

#050E19 #0C1F3A #173B6C #22579E #2C72D1

Accessibility & contrast

On white

11.18

#173B6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173B6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B6C

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B6C	#FFFFFF	#000000	##FFFFFF
##173B6C	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233F6E

Deuteranopia (green-blind)

#13386B

Tritanopia (blue-blind)

#00474E

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173b6c;
/* rgb */ color: rgb(23, 59, 108);
/* oklch */ color: oklch(35.5% 0.095 257.0);

Tailwind

colors: {
  custom: {
    50: '#617096',
    500: '#173b6c',
    950: '#000000',
  },
}

SCSS

$custom: #173b6c;
$custom-light: #617096;
$custom-dark: #000000;

JSON

{
  "hex": "#173b6c",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 108
  },
  "hsl": {
    "h": 214.588,
    "s": 64.885,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35451,
    "c": 0.09467,
    "h": 257
  },
  "luminance": 0.04393
}

Semantic roles & 50–950 ramp

primary

#173B6C

secondary

#A2773D

accent

#A140E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #173B6C

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

Preview Lab → · Contrast checker → · Palette generator →