#171F70#171F70

#171F70 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.7% C 0.137 H 270.5°. Best body text is #FFFFFF at 14.32:1 contrast (WCAG AA passes).

Color values

HEX	#171F70
RGB	rgb(23, 31, 112)
HSL	hsl(235, 66%, 26%)
HSV	hsv(235, 79%, 44%)
CMYK	cmyk(79.5%, 72.3%, 0%, 56.1%)
CIE-LAB	lab(17.14, 27.63, -47.47)
CIE-LCH	lch(17.14, 54.92, 300.20°)
OKLab	oklab(29.7% 0.0013 -0.1374)
OKLCH	oklch(29.7% 0.137 270.5)
XYZ	xyz(3.7670, 2.3316, 15.5776)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F70 #706817

analogous

#174C70 #171F70 #3C1770

triadic

#171F70 #70171F #1F7017

tetradic

#171F70 #70174C #706817 #17703C

square

#171F70 #70174C #706817 #17703C

split-complementary

#171F70 #703C17 #4C7017

monochromatic

#050719 #0D113D #171F70 #212DA3 #2D3CD4

Accessibility & contrast

On white

14.32

#171F70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#171F70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F70

14.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F70	#FFFFFF	#000000	##FFFFFF
##171F70	1.00	14.32	1.47	14.32
#FFFFFF	14.32	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E72

Deuteranopia (green-blind)

#00266F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171f70;
/* rgb */ color: rgb(23, 31, 112);
/* oklch */ color: oklch(29.7% 0.137 270.5);

Tailwind

colors: {
  custom: {
    50: '#655b9a',
    500: '#171f70',
    950: '#000000',
  },
}

SCSS

$custom: #171f70;
$custom-light: #655b9a;
$custom-dark: #000000;

JSON

{
  "hex": "#171f70",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 112
  },
  "hsl": {
    "h": 234.607,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.29698,
    "c": 0.13739,
    "h": 270.5
  },
  "luminance": 0.02332
}

Semantic roles & 50–950 ramp

primary

#171F70

secondary

#A69C3D

accent

#DA3FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #171F70

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

Preview Lab → · Contrast checker → · Palette generator →