#172D5C#172D5C

#172D5C is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.8% C 0.089 H 263.3°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#172D5C
RGB	rgb(23, 45, 92)
HSL	hsl(221, 60%, 23%)
HSV	hsv(221, 75%, 36%)
CMYK	cmyk(75%, 51.1%, 0%, 63.9%)
CIE-LAB	lab(19.36, 9.44, -30.76)
CIE-LCH	lch(19.36, 32.17, 287.06°)
OKLab	oklab(30.8% -0.0104 -0.0882)
OKLCH	oklch(30.8% 0.089 263.3)
XYZ	xyz(3.2228, 2.8313, 10.4998)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D5C #5C4617

analogous

#174F5C #172D5C #24175C

triadic

#172D5C #5C172D #2D5C17

tetradic

#172D5C #5C174F #5C4617 #175C24

square

#172D5C #5C174F #5C4617 #175C24

split-complementary

#172D5C #5C2417 #4F5C17

monochromatic

#060C18 #0B152B #172D5C #23458D #2F5DBE

Accessibility & contrast

On white

13.41

#172D5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172D5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D5C

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D5C	#FFFFFF	#000000	##FFFFFF
##172D5C	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14325E

Deuteranopia (green-blind)

#042C5B

Tritanopia (blue-blind)

#003840

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172d5c;
/* rgb */ color: rgb(23, 45, 92);
/* oklch */ color: oklch(30.8% 0.089 263.3);

Tailwind

colors: {
  custom: {
    50: '#5e658a',
    500: '#172d5c',
    950: '#000000',
  },
}

SCSS

$custom: #172d5c;
$custom-light: #5e658a;
$custom-dark: #000000;

JSON

{
  "hex": "#172d5c",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 92
  },
  "hsl": {
    "h": 220.87,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.30799,
    "c": 0.08877,
    "h": 263.3
  },
  "luminance": 0.02832
}

Semantic roles & 50–950 ramp

primary

#172D5C

secondary

#93773C

accent

#B145E3

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05050C

muted

#797A7D

Preview Lab

Preview with #172D5C

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

Preview Lab → · Contrast checker → · Palette generator →