#171F4F#171F4F

#171F4F is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.088 H 271.8°. Best body text is #FFFFFF at 15.61:1 contrast (WCAG AA passes).

Color values

HEX	#171F4F
RGB	rgb(23, 31, 79)
HSL	hsl(231, 55%, 20%)
HSV	hsv(231, 71%, 31%)
CMYK	cmyk(70.9%, 60.8%, 0%, 69%)
CIE-LAB	lab(13.98, 14.43, -30.69)
CIE-LCH	lch(13.98, 33.91, 295.18°)
OKLab	oklab(26.4% 0.0028 -0.0882)
OKLCH	oklch(26.4% 0.088 271.8)
XYZ	xyz(2.2541, 1.7264, 7.6101)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F4F #4F4717

analogous

#173B4F #171F4F #2B174F

triadic

#171F4F #4F171F #1F4F17

tetradic

#171F4F #4F173B #4F4717 #174F2B

square

#171F4F #4F173B #4F4717 #174F2B

split-complementary

#171F4F #4F2B17 #3B4F17

monochromatic

#070918 #090C20 #171F4F #25327E #3344AE

Accessibility & contrast

On white

15.61

#171F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F4F

15.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F4F	#FFFFFF	#000000	##FFFFFF
##171F4F	1.00	15.61	1.35	15.61
#FFFFFF	15.61	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002651

Deuteranopia (green-blind)

#00214E

Tritanopia (blue-blind)

#002A33

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171f4f;
/* rgb */ color: rgb(23, 31, 79);
/* oklch */ color: oklch(26.4% 0.088 271.8);

Tailwind

colors: {
  custom: {
    50: '#5c5a81',
    500: '#171f4f',
    950: '#000000',
  },
}

SCSS

$custom: #171f4f;
$custom-light: #5c5a81;
$custom-dark: #000000;

JSON

{
  "hex": "#171f4f",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 79
  },
  "hsl": {
    "h": 231.429,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.26401,
    "c": 0.08826,
    "h": 271.8
  },
  "luminance": 0.01727
}

Semantic roles & 50–950 ramp

primary

#171F4F

secondary

#867C3C

accent

#C94ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171F4F

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

Preview Lab → · Contrast checker → · Palette generator →