#171F5D#171F5D

#171F5D is a dark, moderate blue. Relative luminance 0.020; OKLCH L 27.7% C 0.110 H 271.5°. Best body text is #FFFFFF at 15.10:1 contrast (WCAG AA passes).

Color values

HEX	#171F5D
RGB	rgb(23, 31, 93)
HSL	hsl(233, 60%, 23%)
HSV	hsv(233, 75%, 36%)
CMYK	cmyk(75.3%, 66.7%, 0%, 63.5%)
CIE-LAB	lab(15.23, 20.13, -38.10)
CIE-LCH	lch(15.23, 43.09, 297.85°)
OKLab	oklab(27.73% 0.0029 -0.11)
OKLCH	oklch(27.73% 0.11 271.5)
XYZ	xyz(2.8185, 1.9522, 10.5821)
Luminance	0.0195 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F5D #5D5517

analogous

#17425D #171F5D #32175D

triadic

#171F5D #5D171F #1F5D17

tetradic

#171F5D #5D1742 #5D5517 #175D32

square

#171F5D #5D1742 #5D5517 #175D32

split-complementary

#171F5D #5D3217 #425D17

monochromatic

#060819 #0B0F2C #171F5D #232F8E #2F40BF

Accessibility & contrast

On white

15.10

#171F5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#171F5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F5D

15.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F5D	#FFFFFF	#000000	##FFFFFF
##171F5D	1.00	15.10	1.39	15.10
#FFFFFF	15.10	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295F

Deuteranopia (green-blind)

#00235C

Tritanopia (blue-blind)

#002F3A

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171f5d;
/* rgb */ color: rgb(23, 31, 93);
/* oklch */ color: oklch(27.7% 0.110 271.5);

Tailwind

colors: {
  custom: {
    50: '#5f5a8c',
    500: '#171f5d',
    950: '#000000',
  },
}

SCSS

$custom: #171f5d;
$custom-light: #5f5a8c;
$custom-dark: #000000;

JSON

{
  "hex": "#171f5d",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 93
  },
  "hsl": {
    "h": 233.143,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.27725,
    "c": 0.11002,
    "h": 271.5
  },
  "luminance": 0.01952
}

Semantic roles & 50–950 ramp

primary

#171F5D

secondary

#948A3C

accent

#D144E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171F5D

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

Preview Lab → · Contrast checker → · Palette generator →