#171B50#171B50

#171B50 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.6% C 0.096 H 274.2°. Best body text is #FFFFFF at 16.04:1 contrast (WCAG AA passes).

Color values

HEX	#171B50
RGB	rgb(23, 27, 80)
HSL	hsl(236, 55%, 20%)
HSV	hsv(236, 71%, 31%)
CMYK	cmyk(71.2%, 66.3%, 0%, 68.6%)
CIE-LAB	lab(12.89, 17.81, -33.15)
CIE-LCH	lch(12.89, 37.63, 298.25°)
OKLab	oklab(25.62% 0.0069 -0.0955)
OKLCH	oklch(25.62% 0.096 274.2)
XYZ	xyz(2.1928, 1.5450, 7.7705)
Luminance	0.0155 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.47

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B50 #504C17

analogous

#173850 #171B50 #2F1750

triadic

#171B50 #50171B #1B5017

tetradic

#171B50 #501738 #504C17 #17502F

square

#171B50 #501738 #504C17 #17502F

split-complementary

#171B50 #502F17 #385017

monochromatic

#070818 #090B20 #171B50 #252B80 #323BAF

Accessibility & contrast

On white

16.04

#171B50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#171B50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B50

16.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B50	#FFFFFF	#000000	##FFFFFF
##171B50	1.00	16.04	1.31	16.04
#FFFFFF	16.04	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002452

Deuteranopia (green-blind)

#001F4F

Tritanopia (blue-blind)

#002832

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171b50;
/* rgb */ color: rgb(23, 27, 80);
/* oklch */ color: oklch(25.6% 0.096 274.2);

Tailwind

colors: {
  custom: {
    50: '#5c5782',
    500: '#171b50',
    950: '#000000',
  },
}

SCSS

$custom: #171b50;
$custom-light: #5c5782;
$custom-dark: #000000;

JSON

{
  "hex": "#171b50",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 80
  },
  "hsl": {
    "h": 235.789,
    "s": 55.34,
    "l": 20.196
  },
  "oklch": {
    "l": 0.25618,
    "c": 0.09572,
    "h": 274.2
  },
  "luminance": 0.01545
}

Semantic roles & 50–950 ramp

primary

#171B50

secondary

#87823C

accent

#D449DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #171B50

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

Preview Lab → · Contrast checker → · Palette generator →