#171D85#171D85

#171D85 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.7% C 0.167 H 269.7°. Best body text is #FFFFFF at 13.54:1 contrast (WCAG AA passes).

Color values

HEX	#171D85
RGB	rgb(23, 29, 133)
HSL	hsl(237, 71%, 31%)
HSV	hsv(237, 83%, 52%)
CMYK	cmyk(82.7%, 78.2%, 0%, 47.8%)
CIE-LAB	lab(19.03, 36.67, -57.76)
CIE-LCH	lch(19.03, 68.42, 302.41°)
OKLab	oklab(31.75% -0.0009 -0.1673)
OKLCH	oklch(31.75% 0.167 269.7)
XYZ	xyz(5.0249, 2.7538, 22.4524)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D85 #857F17

analogous

#175485 #171D85 #481785

triadic

#171D85 #85171D #1D8517

tetradic

#171D85 #851754 #857F17 #178548

square

#171D85 #851754 #857F17 #178548

split-complementary

#171D85 #854817 #548517

monochromatic

#05061D #0E1251 #171D85 #2028B9 #3A42DD

Accessibility & contrast

On white

13.54

#171D85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#171D85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D85

13.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D85	#FFFFFF	#000000	##FFFFFF
##171D85	1.00	13.54	1.55	13.54
#FFFFFF	13.54	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003488

Deuteranopia (green-blind)

#002983

Tritanopia (blue-blind)

#003C50

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #171d85;
/* rgb */ color: rgb(23, 29, 133);
/* oklch */ color: oklch(31.7% 0.167 269.7);

Tailwind

colors: {
  custom: {
    50: '#6b5aaa',
    500: '#171d85',
    950: '#000000',
  },
}

SCSS

$custom: #171d85;
$custom-light: #6b5aaa;
$custom-dark: #000000;

JSON

{
  "hex": "#171d85",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 133
  },
  "hsl": {
    "h": 236.727,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.31747,
    "c": 0.16733,
    "h": 269.7
  },
  "luminance": 0.02754
}

Semantic roles & 50–950 ramp

primary

#171D85

secondary

#B9B23F

accent

#E43BED

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #171D85

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

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