#172D4C#172D4C

#172D4C is a dark, moderate blue. Relative luminance 0.026; OKLCH L 29.6% C 0.063 H 257.2°. Best body text is #FFFFFF at 13.85:1 contrast (WCAG AA passes).

Color values

HEX	#172D4C
RGB	rgb(23, 45, 76)
HSL	hsl(215, 54%, 19%)
HSV	hsv(215, 70%, 30%)
CMYK	cmyk(69.7%, 40.8%, 0%, 70.2%)
CIE-LAB	lab(18.28, 2.82, -21.77)
CIE-LCH	lch(18.28, 21.95, 277.38°)
OKLab	oklab(29.62% -0.014 -0.0618)
OKLCH	oklch(29.62% 0.063 257.2)
XYZ	xyz(2.5958, 2.5805, 7.1974)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D4C #4C3617

analogous

#17484C #172D4C #1C174C

triadic

#172D4C #4C172D #2D4C17

tetradic

#172D4C #4C1748 #4C3617 #174C1C

square

#172D4C #4C1748 #4C3617 #174C1C

split-complementary

#172D4C #4C1C17 #484C17

monochromatic

#070E17 #09111D #172D4C #25497B #3365AA

Accessibility & contrast

On white

13.85

#172D4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172D4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D4C

13.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D4C	#FFFFFF	#000000	##FFFFFF
##172D4C	1.00	13.85	1.52	13.85
#FFFFFF	13.85	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#202F4D

Deuteranopia (green-blind)

#182A4B

Tritanopia (blue-blind)

#003438

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172d4c;
/* rgb */ color: rgb(23, 45, 76);
/* oklch */ color: oklch(29.6% 0.063 257.2);

Tailwind

colors: {
  custom: {
    50: '#5a657e',
    500: '#172d4c',
    950: '#000000',
  },
}

SCSS

$custom: #172d4c;
$custom-light: #5a657e;
$custom-dark: #000000;

JSON

{
  "hex": "#172d4c",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 76
  },
  "hsl": {
    "h": 215.094,
    "s": 53.535,
    "l": 19.412
  },
  "oklch": {
    "l": 0.29619,
    "c": 0.06334,
    "h": 257.2
  },
  "luminance": 0.02581
}

Semantic roles & 50–950 ramp

primary

#172D4C

secondary

#83653C

accent

#A04BDD

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04050A

muted

#797A7C

Preview Lab

Preview with #172D4C

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

Preview Lab → · Contrast checker → · Palette generator →