#173B6B#173B6B

#173B6B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.4% C 0.093 H 256.7°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#173B6B
RGB	rgb(23, 59, 107)
HSL	hsl(214, 65%, 25%)
HSV	hsv(214, 79%, 42%)
CMYK	cmyk(78.5%, 44.9%, 0%, 58%)
CIE-LAB	lab(24.86, 5.69, -31.70)
CIE-LCH	lch(24.86, 32.21, 280.17°)
OKLab	oklab(35.38% -0.0215 -0.0907)
OKLCH	oklch(35.38% 0.093 256.7)
XYZ	xyz(4.5702, 4.3711, 14.5099)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B6B #6B4717

analogous

#17656B #173B6B #1D176B

triadic

#173B6B #6B173B #3B6B17

tetradic

#173B6B #6B1765 #6B4717 #176B1D

square

#173B6B #6B1765 #6B4717 #176B1D

split-complementary

#173B6B #6B1D17 #656B17

monochromatic

#050E19 #0C1F39 #173B6B #22579D #2D73D0

Accessibility & contrast

On white

11.20

#173B6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173B6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B6B

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B6B	#FFFFFF	#000000	##FFFFFF
##173B6B	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233F6D

Deuteranopia (green-blind)

#15376A

Tritanopia (blue-blind)

#00464D

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173b6b;
/* rgb */ color: rgb(23, 59, 107);
/* oklch */ color: oklch(35.4% 0.093 256.7);

Tailwind

colors: {
  custom: {
    50: '#617096',
    500: '#173b6b',
    950: '#000000',
  },
}

SCSS

$custom: #173b6b;
$custom-light: #617096;
$custom-dark: #000000;

JSON

{
  "hex": "#173b6b",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 107
  },
  "hsl": {
    "h": 214.286,
    "s": 64.615,
    "l": 25.49
  },
  "oklch": {
    "l": 0.35379,
    "c": 0.09319,
    "h": 256.7
  },
  "luminance": 0.04372
}

Semantic roles & 50–950 ramp

primary

#173B6B

secondary

#A1763D

accent

#A040E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #173B6B

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

Preview Lab → · Contrast checker → · Palette generator →