#172C5A#172C5A

#172C5A is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.4% C 0.087 H 263.6°. Best body text is #FFFFFF at 13.60:1 contrast (WCAG AA passes).

Color values

HEX	#172C5A
RGB	rgb(23, 44, 90)
HSL	hsl(221, 59%, 22%)
HSV	hsv(221, 74%, 35%)
CMYK	cmyk(74.4%, 51.1%, 0%, 64.7%)
CIE-LAB	lab(18.89, 9.34, -30.18)
CIE-LCH	lch(18.89, 31.59, 287.19°)
OKLab	oklab(30.4% -0.0097 -0.0865)
OKLCH	oklch(30.4% 0.087 263.6)
XYZ	xyz(3.0988, 2.7214, 10.0328)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C5A #5A4517

analogous

#174E5A #172C5A #24175A

triadic

#172C5A #5A172C #2C5A17

tetradic

#172C5A #5A174E #5A4517 #175A24

square

#172C5A #5A174E #5A4517 #175A24

split-complementary

#172C5A #5A2417 #4E5A17

monochromatic

#060C18 #0B1429 #172C5A #23448B #305CBB

Accessibility & contrast

On white

13.60

#172C5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172C5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C5A

13.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C5A	#FFFFFF	#000000	##FFFFFF
##172C5A	1.00	13.60	1.54	13.60
#FFFFFF	13.60	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14315C

Deuteranopia (green-blind)

#052B59

Tritanopia (blue-blind)

#00373E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172c5a;
/* rgb */ color: rgb(23, 44, 90);
/* oklch */ color: oklch(30.4% 0.087 263.6);

Tailwind

colors: {
  custom: {
    50: '#5d6489',
    500: '#172c5a',
    950: '#000000',
  },
}

SCSS

$custom: #172c5a;
$custom-light: #5d6489;
$custom-dark: #000000;

JSON

{
  "hex": "#172c5a",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 90
  },
  "hsl": {
    "h": 221.194,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.30397,
    "c": 0.08701,
    "h": 263.6
  },
  "luminance": 0.02722
}

Semantic roles & 50–950 ramp

primary

#172C5A

secondary

#91763C

accent

#B145E2

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172C5A

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

Preview Lab → · Contrast checker → · Palette generator →