#171F4E#171F4E

#171F4E is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.3% C 0.087 H 271.8°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#171F4E
RGB	rgb(23, 31, 78)
HSL	hsl(231, 54%, 20%)
HSV	hsv(231, 71%, 31%)
CMYK	cmyk(70.5%, 60.3%, 0%, 69.4%)
CIE-LAB	lab(13.90, 14.02, -30.14)
CIE-LCH	lch(13.90, 33.24, 294.94°)
OKLab	oklab(26.31% 0.0028 -0.0866)
OKLCH	oklch(26.31% 0.087 271.8)
XYZ	xyz(2.2180, 1.7120, 7.4198)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F4E #4E4617

analogous

#173A4E #171F4E #2B174E

triadic

#171F4E #4E171F #1F4E17

tetradic

#171F4E #4E173A #4E4617 #174E2B

square

#171F4E #4E173A #4E4617 #174E2B

split-complementary

#171F4E #4E2B17 #3A4E17

monochromatic

#070918 #090C1F #171F4E #25327D #3345AD

Accessibility & contrast

On white

15.64

#171F4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171F4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F4E

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F4E	#FFFFFF	#000000	##FFFFFF
##171F4E	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002650

Deuteranopia (green-blind)

#00214D

Tritanopia (blue-blind)

#002A33

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171f4e;
/* rgb */ color: rgb(23, 31, 78);
/* oklch */ color: oklch(26.3% 0.087 271.8);

Tailwind

colors: {
  custom: {
    50: '#5b5a80',
    500: '#171f4e',
    950: '#000000',
  },
}

SCSS

$custom: #171f4e;
$custom-light: #5b5a80;
$custom-dark: #000000;

JSON

{
  "hex": "#171f4e",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 78
  },
  "hsl": {
    "h": 231.273,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.26311,
    "c": 0.08664,
    "h": 271.8
  },
  "luminance": 0.01712
}

Semantic roles & 50–950 ramp

primary

#171F4E

secondary

#857A3C

accent

#C84ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171F4E

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

Preview Lab → · Contrast checker → · Palette generator →