#171B4F#171B4F

#171B4F is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.5% C 0.094 H 274.2°. Best body text is #FFFFFF at 16.08:1 contrast (WCAG AA passes).

Color values

HEX	#171B4F
RGB	rgb(23, 27, 79)
HSL	hsl(236, 55%, 20%)
HSV	hsv(236, 71%, 31%)
CMYK	cmyk(70.9%, 65.8%, 0%, 69%)
CIE-LAB	lab(12.80, 17.40, -32.61)
CIE-LCH	lch(12.80, 36.96, 298.09°)
OKLab	oklab(25.52% 0.007 -0.0939)
OKLCH	oklch(25.52% 0.094 274.2)
XYZ	xyz(2.1561, 1.5304, 7.5774)
Luminance	0.0153 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B4F #4F4B17

analogous

#17374F #171B4F #2F174F

triadic

#171B4F #4F171B #1B4F17

tetradic

#171B4F #4F1737 #4F4B17 #174F2F

square

#171B4F #4F1737 #4F4B17 #174F2F

split-complementary

#171B4F #4F2F17 #374F17

monochromatic

#070818 #090B20 #171B4F #252B7E #333BAE

Accessibility & contrast

On white

16.08

#171B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#171B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B4F

16.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B4F	#FFFFFF	#000000	##FFFFFF
##171B4F	1.00	16.08	1.31	16.08
#FFFFFF	16.08	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002451

Deuteranopia (green-blind)

#001F4E

Tritanopia (blue-blind)

#002832

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171b4f;
/* rgb */ color: rgb(23, 27, 79);
/* oklch */ color: oklch(25.5% 0.094 274.2);

Tailwind

colors: {
  custom: {
    50: '#5c5781',
    500: '#171b4f',
    950: '#000000',
  },
}

SCSS

$custom: #171b4f;
$custom-light: #5c5781;
$custom-dark: #000000;

JSON

{
  "hex": "#171b4f",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 79
  },
  "hsl": {
    "h": 235.714,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.25522,
    "c": 0.09416,
    "h": 274.2
  },
  "luminance": 0.01531
}

Semantic roles & 50–950 ramp

primary

#171B4F

secondary

#86813C

accent

#D44ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171B4F

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

Preview Lab → · Contrast checker → · Palette generator →