#172B64#172B64

#172B64 is a dark, moderate blue. Relative luminance 0.028; OKLCH L 31.0% C 0.104 H 265.9°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#172B64
RGB	rgb(23, 43, 100)
HSL	hsl(224, 63%, 24%)
HSV	hsv(224, 77%, 39%)
CMYK	cmyk(77%, 57%, 0%, 60.8%)
CIE-LAB	lab(19.35, 14.25, -36.04)
CIE-LCH	lch(19.35, 38.75, 291.57°)
OKLab	oklab(30.99% -0.0074 -0.1037)
OKLCH	oklch(30.99% 0.104 265.9)
XYZ	xyz(3.5167, 2.8296, 12.4150)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B64 #645017

analogous

#175264 #172B64 #2A1764

triadic

#172B64 #64172B #2B6417

tetradic

#172B64 #641752 #645017 #17642A

square

#172B64 #641752 #645017 #17642A

split-complementary

#172B64 #642A17 #526417

monochromatic

#060B19 #0C1632 #172B64 #224096 #2E56C8

Accessibility & contrast

On white

13.41

#172B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B64

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B64	#FFFFFF	#000000	##FFFFFF
##172B64	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)

#023366

Deuteranopia (green-blind)

#002C63

Tritanopia (blue-blind)

#003943

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172b64;
/* rgb */ color: rgb(23, 43, 100);
/* oklch */ color: oklch(31.0% 0.104 265.9);

Tailwind

colors: {
  custom: {
    50: '#606391',
    500: '#172b64',
    950: '#000000',
  },
}

SCSS

$custom: #172b64;
$custom-light: #606391;
$custom-dark: #000000;

JSON

{
  "hex": "#172b64",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 100
  },
  "hsl": {
    "h": 224.416,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.3099,
    "c": 0.104,
    "h": 265.9
  },
  "luminance": 0.0283
}

Semantic roles & 50–950 ramp

primary

#172B64

secondary

#9A823C

accent

#BB42E6

background

#F6F5F8

surface

#EBEAF0

border

#C6C6CB

text

#05050D

muted

#7A797D

Preview Lab

Preview with #172B64

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

Preview Lab → · Contrast checker → · Palette generator →