#171F7B#171F7B

#171F7B is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.9% C 0.152 H 270.0°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#171F7B
RGB	rgb(23, 31, 123)
HSL	hsl(235, 68%, 29%)
HSV	hsv(235, 81%, 48%)
CMYK	cmyk(81.3%, 74.8%, 0%, 51.8%)
CIE-LAB	lab(18.33, 31.80, -52.58)
CIE-LCH	lch(18.33, 61.45, 301.17°)
OKLab	oklab(30.91% -0.0001 -0.1523)
OKLCH	oklch(30.91% 0.152 270)
XYZ	xyz(4.4173, 2.5917, 19.0025)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7B #7B7317

analogous

#17517B #171F7B #41177B

triadic

#171F7B #7B171F #1F7B17

tetradic

#171F7B #7B1751 #7B7317 #177B41

square

#171F7B #7B1751 #7B7317 #177B41

split-complementary

#171F7B #7B4117 #517B17

monochromatic

#05061A #0D1247 #171F7B #212CAF #3341D9

Accessibility & contrast

On white

13.83

#171F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#171F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7B

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7B	#FFFFFF	#000000	##FFFFFF
##171F7B	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327E

Deuteranopia (green-blind)

#002879

Tritanopia (blue-blind)

#00394B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171f7b;
/* rgb */ color: rgb(23, 31, 123);
/* oklch */ color: oklch(30.9% 0.152 270.0);

Tailwind

colors: {
  custom: {
    50: '#685ba2',
    500: '#171f7b',
    950: '#000000',
  },
}

SCSS

$custom: #171f7b;
$custom-light: #685ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7b",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 123
  },
  "hsl": {
    "h": 235.2,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30911,
    "c": 0.15229,
    "h": 270
  },
  "luminance": 0.02592
}

Semantic roles & 50–950 ramp

primary

#171F7B

secondary

#B0A73E

accent

#DD3CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7B

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

Preview Lab → · Contrast checker → · Palette generator →