#171E40#171E40

#171E40 is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 24.9% C 0.065 H 272.2°. Best body text is #FFFFFF at 16.20:1 contrast (WCAG AA passes).

Color values

HEX	#171E40
RGB	rgb(23, 30, 64)
HSL	hsl(230, 47%, 17%)
HSV	hsv(230, 64%, 25%)
CMYK	cmyk(64.1%, 53.1%, 0%, 74.9%)
CIE-LAB	lab(12.48, 9.07, -22.72)
CIE-LCH	lch(12.48, 24.46, 291.76°)
OKLab	oklab(24.89% 0.0024 -0.0648)
OKLCH	oklch(24.89% 0.065 272.2)
XYZ	xyz(1.7427, 1.4807, 5.0435)
Luminance	0.0148 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E40 #403917

analogous

#173340 #171E40 #251740

triadic

#171E40 #40171E #1E4017

tetradic

#171E40 #401733 #403917 #174025

square

#171E40 #401733 #403917 #174025

split-complementary

#171E40 #402517 #334017

monochromatic

#080B17 #080B17 #171E40 #27336D #37489A

Accessibility & contrast

On white

16.20

#171E40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#171E40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E40

16.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E40	#FFFFFF	#000000	##FFFFFF
##171E40	1.00	16.20	1.30	16.20
#FFFFFF	16.20	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E2241

Deuteranopia (green-blind)

#091F3F

Tritanopia (blue-blind)

#02262B

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #171e40;
/* rgb */ color: rgb(23, 30, 64);
/* oklch */ color: oklch(24.9% 0.065 272.2);

Tailwind

colors: {
  custom: {
    50: '#585975',
    500: '#171e40',
    950: '#000000',
  },
}

SCSS

$custom: #171e40;
$custom-light: #585975;
$custom-dark: #000000;

JSON

{
  "hex": "#171e40",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 64
  },
  "hsl": {
    "h": 229.756,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.24894,
    "c": 0.06481,
    "h": 272.2
  },
  "luminance": 0.01481
}

Semantic roles & 50–950 ramp

primary

#171E40

secondary

#776D3C

accent

#C051D7

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #171E40

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

Preview Lab → · Contrast checker → · Palette generator →