#171E81#171E81

#171E81 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.4% C 0.161 H 269.8°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#171E81
RGB	rgb(23, 30, 129)
HSL	hsl(236, 70%, 30%)
HSV	hsv(236, 82%, 51%)
CMYK	cmyk(82.2%, 76.7%, 0%, 49.4%)
CIE-LAB	lab(18.78, 34.63, -55.65)
CIE-LCH	lch(18.78, 65.55, 301.89°)
OKLab	oklab(31.43% -0.0006 -0.1612)
OKLCH	oklch(31.43% 0.161 269.8)
XYZ	xyz(4.7787, 2.6951, 21.0330)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E81 #817A17

analogous

#175381 #171E81 #451781

triadic

#171E81 #81171E #1E8117

tetradic

#171E81 #811753 #817A17 #178145

square

#171E81 #811753 #817A17 #178145

split-complementary

#171E81 #814517 #538117

monochromatic

#05061A #0E124D #171E81 #202AB5 #3742DB

Accessibility & contrast

On white

13.64

#171E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#171E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E81

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E81	#FFFFFF	#000000	##FFFFFF
##171E81	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)

#003384

Deuteranopia (green-blind)

#00287F

Tritanopia (blue-blind)

#003B4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #171e81;
/* rgb */ color: rgb(23, 30, 129);
/* oklch */ color: oklch(31.4% 0.161 269.8);

Tailwind

colors: {
  custom: {
    50: '#695ba7',
    500: '#171e81',
    950: '#000000',
  },
}

SCSS

$custom: #171e81;
$custom-light: #695ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#171e81",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 129
  },
  "hsl": {
    "h": 236.038,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31433,
    "c": 0.16121,
    "h": 269.8
  },
  "luminance": 0.02696
}

Semantic roles & 50–950 ramp

primary

#171E81

secondary

#B5AE3E

accent

#E13BED

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080410

muted

#7A797F

Preview Lab

Preview with #171E81

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

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