#171F81#171F81

#171F81 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.6% C 0.160 H 269.6°. Best body text is #FFFFFF at 13.55:1 contrast (WCAG AA passes).

Color values

HEX	#171F81
RGB	rgb(23, 31, 129)
HSL	hsl(235, 70%, 30%)
HSV	hsv(235, 82%, 51%)
CMYK	cmyk(82.2%, 76%, 0%, 49.4%)
CIE-LAB	lab(19.00, 34.01, -55.29)
CIE-LCH	lch(19.00, 64.91, 301.60°)
OKLab	oklab(31.59% -0.001 -0.1602)
OKLCH	oklch(31.59% 0.16 269.6)
XYZ	xyz(4.8044, 2.7466, 21.0415)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F81 #817917

analogous

#175481 #171F81 #441781

triadic

#171F81 #81171F #1F8117

tetradic

#171F81 #811754 #817917 #178144

square

#171F81 #811754 #817917 #178144

split-complementary

#171F81 #814417 #548117

monochromatic

#05061A #0E134D #171F81 #202BB5 #3743DB

Accessibility & contrast

On white

13.55

#171F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#171F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F81

13.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F81	#FFFFFF	#000000	##FFFFFF
##171F81	1.00	13.55	1.55	13.55
#FFFFFF	13.55	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#00297F

Tritanopia (blue-blind)

#003C4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #171f81;
/* rgb */ color: rgb(23, 31, 129);
/* oklch */ color: oklch(31.6% 0.160 269.6);

Tailwind

colors: {
  custom: {
    50: '#695ba7',
    500: '#171f81',
    950: '#000000',
  },
}

SCSS

$custom: #171f81;
$custom-light: #695ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#171f81",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 129
  },
  "hsl": {
    "h": 235.472,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.3159,
    "c": 0.16016,
    "h": 269.6
  },
  "luminance": 0.02747
}

Semantic roles & 50–950 ramp

primary

#171F81

secondary

#B5AC3E

accent

#DF3BED

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080410

muted

#7A797F

Preview Lab

Preview with #171F81

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

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