#171D73#171D73

#171D73 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.7% C 0.144 H 270.8°. Best body text is #FFFFFF at 14.39:1 contrast (WCAG AA passes).

Color values

HEX	#171D73
RGB	rgb(23, 29, 115)
HSL	hsl(236, 67%, 27%)
HSV	hsv(236, 80%, 45%)
CMYK	cmyk(80%, 74.8%, 0%, 54.9%)
CIE-LAB	lab(16.98, 30.09, -49.67)
CIE-LCH	lch(16.98, 58.07, 301.21°)
OKLab	oklab(29.68% 0.002 -0.1438)
OKLCH	oklch(29.68% 0.144 270.8)
XYZ	xyz(3.8862, 2.2983, 16.4551)
Luminance	0.0230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D73 #736D17

analogous

#174B73 #171D73 #3F1773

triadic

#171D73 #73171D #1D7317

tetradic

#171D73 #73174B #736D17 #17733F

square

#171D73 #73174B #736D17 #17733F

split-complementary

#171D73 #733F17 #4B7317

monochromatic

#05061A #0D1040 #171D73 #212AA6 #2F3AD5

Accessibility & contrast

On white

14.39

#171D73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#171D73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D73

14.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D73	#FFFFFF	#000000	##FFFFFF
##171D73	1.00	14.39	1.46	14.39
#FFFFFF	14.39	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E76

Deuteranopia (green-blind)

#002571

Tritanopia (blue-blind)

#003546

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171d73;
/* rgb */ color: rgb(23, 29, 115);
/* oklch */ color: oklch(29.7% 0.144 270.8);

Tailwind

colors: {
  custom: {
    50: '#66599c',
    500: '#171d73',
    950: '#000000',
  },
}

SCSS

$custom: #171d73;
$custom-light: #66599c;
$custom-dark: #000000;

JSON

{
  "hex": "#171d73",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 115
  },
  "hsl": {
    "h": 236.087,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.29681,
    "c": 0.14381,
    "h": 270.8
  },
  "luminance": 0.02299
}

Semantic roles & 50–950 ramp

primary

#171D73

secondary

#A9A23D

accent

#DE3EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171D73

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

Preview Lab → · Contrast checker → · Palette generator →