#172F64#172F64

#172F64 is a dark, moderate blue. Relative luminance 0.031; OKLCH L 31.9% C 0.098 H 263.5°. Best body text is #FFFFFF at 12.91:1 contrast (WCAG AA passes).

Color values

HEX	#172F64
RGB	rgb(23, 47, 100)
HSL	hsl(221, 63%, 24%)
HSV	hsv(221, 77%, 39%)
CMYK	cmyk(77%, 53%, 0%, 60.8%)
CIE-LAB	lab(20.58, 11.33, -34.05)
CIE-LCH	lch(20.58, 35.89, 288.40°)
OKLab	oklab(31.92% -0.0111 -0.0978)
OKLCH	oklch(31.92% 0.098 263.5)
XYZ	xyz(3.6693, 3.1349, 12.4658)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F64 #644C17

analogous

#175664 #172F64 #261764

triadic

#172F64 #64172F #2F6417

tetradic

#172F64 #641756 #644C17 #176426

square

#172F64 #641756 #644C17 #176426

split-complementary

#172F64 #642617 #566417

monochromatic

#060C19 #0C1832 #172F64 #224696 #2E5EC8

Accessibility & contrast

On white

12.91

#172F64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#172F64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F64

12.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F64	#FFFFFF	#000000	##FFFFFF
##172F64	1.00	12.91	1.63	12.91
#FFFFFF	12.91	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#103566

Deuteranopia (green-blind)

#002E63

Tritanopia (blue-blind)

#003C44

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172f64;
/* rgb */ color: rgb(23, 47, 100);
/* oklch */ color: oklch(31.9% 0.098 263.5);

Tailwind

colors: {
  custom: {
    50: '#606790',
    500: '#172f64',
    950: '#000000',
  },
}

SCSS

$custom: #172f64;
$custom-light: #606790;
$custom-dark: #000000;

JSON

{
  "hex": "#172f64",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 100
  },
  "hsl": {
    "h": 221.299,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.31922,
    "c": 0.09845,
    "h": 263.5
  },
  "luminance": 0.03135
}

Semantic roles & 50–950 ramp

primary

#172F64

secondary

#9A7D3C

accent

#B342E6

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05060D

muted

#7A7A7D

Preview Lab

Preview with #172F64

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

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