#171F4B#171F4B

#171F4B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.0% C 0.082 H 271.8°. Best body text is #FFFFFF at 15.74:1 contrast (WCAG AA passes).

Color values

HEX	#171F4B
RGB	rgb(23, 31, 75)
HSL	hsl(231, 53%, 19%)
HSV	hsv(231, 69%, 29%)
CMYK	cmyk(69.3%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.65, 12.79, -28.49)
CIE-LCH	lch(13.65, 31.22, 294.17°)
OKLab	oklab(26.05% 0.0026 -0.0817)
OKLCH	oklch(26.05% 0.082 271.8)
XYZ	xyz(2.1129, 1.6700, 6.8662)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F4B #4B4317

analogous

#17394B #171F4B #29174B

triadic

#171F4B #4B171F #1F4B17

tetradic

#171F4B #4B1739 #4B4317 #174B29

square

#171F4B #4B1739 #4B4317 #174B29

split-complementary

#171F4B #4B2917 #394B17

monochromatic

#070A17 #090C1C #171F4B #25327A #3446A9

Accessibility & contrast

On white

15.74

#171F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#171F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F4B

15.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F4B	#FFFFFF	#000000	##FFFFFF
##171F4B	1.00	15.74	1.33	15.74
#FFFFFF	15.74	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04254D

Deuteranopia (green-blind)

#00214A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171f4b;
/* rgb */ color: rgb(23, 31, 75);
/* oklch */ color: oklch(26.0% 0.082 271.8);

Tailwind

colors: {
  custom: {
    50: '#5b5a7e',
    500: '#171f4b',
    950: '#000000',
  },
}

SCSS

$custom: #171f4b;
$custom-light: #5b5a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#171f4b",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 230.769,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.26048,
    "c": 0.08176,
    "h": 271.8
  },
  "luminance": 0.0167
}

Semantic roles & 50–950 ramp

primary

#171F4B

secondary

#82773C

accent

#C64BDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171F4B

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

Preview Lab → · Contrast checker → · Palette generator →