#171F7C#171F7C

#171F7C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.154 H 269.9°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#171F7C
RGB	rgb(23, 31, 124)
HSL	hsl(235, 69%, 29%)
HSV	hsv(235, 81%, 49%)
CMYK	cmyk(81.5%, 75%, 0%, 51.4%)
CIE-LAB	lab(18.44, 32.17, -53.03)
CIE-LCH	lch(18.44, 62.03, 301.24°)
OKLab	oklab(31.02% -0.0002 -0.1536)
OKLCH	oklch(31.02% 0.154 269.9)
XYZ	xyz(4.4802, 2.6169, 19.3339)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7C #7C7417

analogous

#17527C #171F7C #42177C

triadic

#171F7C #7C171F #1F7C17

tetradic

#171F7C #7C1752 #7C7417 #177C42

square

#171F7C #7C1752 #7C7417 #177C42

split-complementary

#171F7C #7C4217 #527C17

monochromatic

#05061A #0D1248 #171F7C #212CB0 #3441D9

Accessibility & contrast

On white

13.78

#171F7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#171F7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7C

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7C	#FFFFFF	#000000	##FFFFFF
##171F7C	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327F

Deuteranopia (green-blind)

#00287A

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171f7c;
/* rgb */ color: rgb(23, 31, 124);
/* oklch */ color: oklch(31.0% 0.154 269.9);

Tailwind

colors: {
  custom: {
    50: '#685ba3',
    500: '#171f7c',
    950: '#000000',
  },
}

SCSS

$custom: #171f7c;
$custom-light: #685ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7c",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 124
  },
  "hsl": {
    "h": 235.248,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31023,
    "c": 0.15361,
    "h": 269.9
  },
  "luminance": 0.02617
}

Semantic roles & 50–950 ramp

primary

#171F7C

secondary

#B1A83E

accent

#DE3CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7C

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

Preview Lab → · Contrast checker → · Palette generator →