#171F77#171F77

#171F77 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.5% C 0.147 H 270.2°. Best body text is #FFFFFF at 14.01:1 contrast (WCAG AA passes).

Color values

HEX	#171F77
RGB	rgb(23, 31, 119)
HSL	hsl(235, 68%, 28%)
HSV	hsv(235, 81%, 47%)
CMYK	cmyk(80.7%, 73.9%, 0%, 53.3%)
CIE-LAB	lab(17.89, 30.30, -50.74)
CIE-LCH	lch(17.89, 59.10, 300.84°)
OKLab	oklab(30.46% 0.0004 -0.1469)
OKLCH	oklch(30.46% 0.147 270.2)
XYZ	xyz(4.1720, 2.4936, 17.7106)
Luminance	0.0249 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F77 #776F17

analogous

#174F77 #171F77 #3F1777

triadic

#171F77 #77171F #1F7717

tetradic

#171F77 #77174F #776F17 #17773F

square

#171F77 #77174F #776F17 #17773F

split-complementary

#171F77 #773F17 #4F7717

monochromatic

#05071A #0D1244 #171F77 #212CAA #313FD7

Accessibility & contrast

On white

14.01

#171F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#171F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F77

14.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F77	#FFFFFF	#000000	##FFFFFF
##171F77	1.00	14.01	1.50	14.01
#FFFFFF	14.01	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307A

Deuteranopia (green-blind)

#002775

Tritanopia (blue-blind)

#003848

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171f77;
/* rgb */ color: rgb(23, 31, 119);
/* oklch */ color: oklch(30.5% 0.147 270.2);

Tailwind

colors: {
  custom: {
    50: '#665b9f',
    500: '#171f77',
    950: '#000000',
  },
}

SCSS

$custom: #171f77;
$custom-light: #665b9f;
$custom-dark: #000000;

JSON

{
  "hex": "#171f77",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 119
  },
  "hsl": {
    "h": 235,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.30465,
    "c": 0.14694,
    "h": 270.2
  },
  "luminance": 0.02494
}

Semantic roles & 50–950 ramp

primary

#171F77

secondary

#ACA33E

accent

#DC3DEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #171F77

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

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