#172D4B#172D4B

#172D4B is a dark, moderate cyan. Relative luminance 0.026; OKLCH L 29.6% C 0.062 H 256.6°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#172D4B
RGB	rgb(23, 45, 75)
HSL	hsl(215, 53%, 19%)
HSV	hsv(215, 69%, 29%)
CMYK	cmyk(69.3%, 40%, 0%, 70.6%)
CIE-LAB	lab(18.22, 2.41, -21.18)
CIE-LCH	lch(18.22, 21.32, 276.50°)
OKLab	oklab(29.55% -0.0143 -0.0601)
OKLCH	oklch(29.55% 0.062 256.6)
XYZ	xyz(2.5613, 2.5667, 7.0157)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D4B #4B3517

analogous

#17474B #172D4B #1B174B

triadic

#172D4B #4B172D #2D4B17

tetradic

#172D4B #4B1747 #4B3517 #174B1B

square

#172D4B #4B1747 #4B3517 #174B1B

split-complementary

#172D4B #4B1B17 #474B17

monochromatic

#070E17 #09111C #172D4B #25497A #3465A9

Accessibility & contrast

On white

13.88

#172D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D4B

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D4B	#FFFFFF	#000000	##FFFFFF
##172D4B	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#202F4C

Deuteranopia (green-blind)

#192A4A

Tritanopia (blue-blind)

#003438

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172d4b;
/* rgb */ color: rgb(23, 45, 75);
/* oklch */ color: oklch(29.6% 0.062 256.6);

Tailwind

colors: {
  custom: {
    50: '#5a657d',
    500: '#172d4b',
    950: '#000000',
  },
}

SCSS

$custom: #172d4b;
$custom-light: #5a657d;
$custom-dark: #000000;

JSON

{
  "hex": "#172d4b",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 75
  },
  "hsl": {
    "h": 214.615,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.29552,
    "c": 0.06175,
    "h": 256.6
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#172D4B

secondary

#82643C

accent

#9F4BDC

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#040509

muted

#797A7B

Preview Lab

Preview with #172D4B

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

Preview Lab → · Contrast checker → · Palette generator →