#171F79#171F79

#171F79 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.7% C 0.150 H 270.1°. Best body text is #FFFFFF at 13.92:1 contrast (WCAG AA passes).

Color values

HEX	#171F79
RGB	rgb(23, 31, 121)
HSL	hsl(235, 68%, 28%)
HSV	hsv(235, 81%, 47%)
CMYK	cmyk(81%, 74.4%, 0%, 52.5%)
CIE-LAB	lab(18.11, 31.05, -51.67)
CIE-LCH	lch(18.11, 60.28, 301.01°)
OKLab	oklab(30.69% 0.0002 -0.1496)
OKLCH	oklch(30.69% 0.15 270.1)
XYZ	xyz(4.2933, 2.5421, 18.3499)
Luminance	0.0254 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F79 #797117

analogous

#175079 #171F79 #401779

triadic

#171F79 #79171F #1F7917

tetradic

#171F79 #791750 #797117 #177940

square

#171F79 #791750 #797117 #177940

split-complementary

#171F79 #794017 #507917

monochromatic

#05071A #0D1246 #171F79 #212CAC #3240D8

Accessibility & contrast

On white

13.92

#171F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F79

13.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F79	#FFFFFF	#000000	##FFFFFF
##171F79	1.00	13.92	1.51	13.92
#FFFFFF	13.92	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317C

Deuteranopia (green-blind)

#002777

Tritanopia (blue-blind)

#00394A

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171f79;
/* rgb */ color: rgb(23, 31, 121);
/* oklch */ color: oklch(30.7% 0.150 270.1);

Tailwind

colors: {
  custom: {
    50: '#675ba1',
    500: '#171f79',
    950: '#000000',
  },
}

SCSS

$custom: #171f79;
$custom-light: #675ba1;
$custom-dark: #000000;

JSON

{
  "hex": "#171f79",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 121
  },
  "hsl": {
    "h": 235.102,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30687,
    "c": 0.14962,
    "h": 270.1
  },
  "luminance": 0.02543
}

Semantic roles & 50–950 ramp

primary

#171F79

secondary

#AEA53E

accent

#DD3DEB

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F79

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

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