#172571#172571

#172571 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 30.9% C 0.131 H 268.9°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#172571
RGB	rgb(23, 37, 113)
HSL	hsl(231, 66%, 27%)
HSV	hsv(231, 80%, 44%)
CMYK	cmyk(79.6%, 67.3%, 0%, 55.7%)
CIE-LAB	lab(18.79, 23.89, -45.41)
CIE-LCH	lch(18.79, 51.31, 297.75°)
OKLab	oklab(30.93% -0.0025 -0.1313)
OKLCH	oklch(30.93% 0.131 268.9)
XYZ	xyz(3.9945, 2.6971, 15.9297)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172571 #716317

analogous

#175271 #172571 #361771

triadic

#172571 #711725 #257117

tetradic

#172571 #711752 #716317 #177136

square

#172571 #711752 #716317 #177136

split-complementary

#172571 #713617 #527117

monochromatic

#050819 #0D143E #172571 #2136A4 #2E48D4

Accessibility & contrast

On white

13.64

#172571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172571

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172571	#FFFFFF	#000000	##FFFFFF
##172571	1.00	13.64	1.54	13.64
#FFFFFF	13.64	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003273

Deuteranopia (green-blind)

#002A70

Tritanopia (blue-blind)

#003947

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172571;
/* rgb */ color: rgb(23, 37, 113);
/* oklch */ color: oklch(30.9% 0.131 268.9);

Tailwind

colors: {
  custom: {
    50: '#645f9b',
    500: '#172571',
    950: '#000000',
  },
}

SCSS

$custom: #172571;
$custom-light: #645f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#172571",
  "rgb": {
    "r": 23,
    "g": 37,
    "b": 113
  },
  "hsl": {
    "h": 230.667,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.30931,
    "c": 0.13135,
    "h": 268.9
  },
  "luminance": 0.02698
}

Semantic roles & 50–950 ramp

primary

#172571

secondary

#A7963D

accent

#CF3FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #172571

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

Preview Lab → · Contrast checker → · Palette generator →