#171B3E#171B3E

#171B3E is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.0% C 0.066 H 275.3°. Best body text is #FFFFFF at 16.63:1 contrast (WCAG AA passes).

Color values

HEX	#171B3E
RGB	rgb(23, 27, 62)
HSL	hsl(234, 46%, 17%)
HSV	hsv(234, 63%, 24%)
CMYK	cmyk(62.9%, 56.5%, 0%, 75.7%)
CIE-LAB	lab(11.37, 10.55, -23.09)
CIE-LCH	lch(11.37, 25.39, 294.56°)
OKLab	oklab(24% 0.0062 -0.0659)
OKLCH	oklch(24% 0.066 275.3)
XYZ	xyz(1.6145, 1.3137, 4.7250)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B3E #3E3A17

analogous

#172F3E #171B3E #27173E

triadic

#171B3E #3E171B #1B3E17

tetradic

#171B3E #3E172F #3E3A17 #173E27

square

#171B3E #3E172F #3E3A17 #173E27

split-complementary

#171B3E #3E2717 #2F3E17

monochromatic

#080A16 #080A16 #171B3E #282E6B #384297

Accessibility & contrast

On white

16.63

#171B3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#171B3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B3E

16.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B3E	#FFFFFF	#000000	##FFFFFF
##171B3E	1.00	16.63	1.26	16.63
#FFFFFF	16.63	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A203F

Deuteranopia (green-blind)

#051D3D

Tritanopia (blue-blind)

#042329

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #171b3e;
/* rgb */ color: rgb(23, 27, 62);
/* oklch */ color: oklch(24.0% 0.066 275.3);

Tailwind

colors: {
  custom: {
    50: '#585773',
    500: '#171b3e',
    950: '#000000',
  },
}

SCSS

$custom: #171b3e;
$custom-light: #585773;
$custom-dark: #000000;

JSON

{
  "hex": "#171b3e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 62
  },
  "hsl": {
    "h": 233.846,
    "s": 45.882,
    "l": 16.667
  },
  "oklch": {
    "l": 0.24001,
    "c": 0.06619,
    "h": 275.3
  },
  "luminance": 0.01314
}

Semantic roles & 50–950 ramp

primary

#171B3E

secondary

#756F3C

accent

#C852D6

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #171B3E

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

Preview Lab → · Contrast checker → · Palette generator →