#171B6B#171B6B

#171B6B is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.4% C 0.135 H 271.8°. Best body text is #FFFFFF at 14.94:1 contrast (WCAG AA passes).

Color values

HEX	#171B6B
RGB	rgb(23, 27, 107)
HSL	hsl(237, 65%, 25%)
HSV	hsv(237, 79%, 42%)
CMYK	cmyk(78.5%, 74.8%, 0%, 58%)
CIE-LAB	lab(15.63, 28.38, -46.70)
CIE-LCH	lch(15.63, 54.65, 301.29°)
OKLab	oklab(28.45% 0.0042 -0.1351)
OKLCH	oklch(28.45% 0.135 271.8)
XYZ	xyz(3.3982, 2.0272, 14.1193)
Luminance	0.0203 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6B #6B6717

analogous

#17456B #171B6B #3D176B

triadic

#171B6B #6B171B #1B6B17

tetradic

#171B6B #6B1745 #6B6717 #176B3D

square

#171B6B #6B1745 #6B6717 #176B3D

split-complementary

#171B6B #6B3D17 #456B17

monochromatic

#050619 #0C0E39 #171B6B #22289D #2D34D0

Accessibility & contrast

On white

14.94

#171B6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#171B6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6B

14.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6B	#FFFFFF	#000000	##FFFFFF
##171B6B	1.00	14.94	1.41	14.94
#FFFFFF	14.94	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6D

Deuteranopia (green-blind)

#00236A

Tritanopia (blue-blind)

#003141

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171b6b;
/* rgb */ color: rgb(23, 27, 107);
/* oklch */ color: oklch(28.4% 0.135 271.8);

Tailwind

colors: {
  custom: {
    50: '#645896',
    500: '#171b6b',
    950: '#000000',
  },
}

SCSS

$custom: #171b6b;
$custom-light: #645896;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6b",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 107
  },
  "hsl": {
    "h": 237.143,
    "s": 64.615,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28448,
    "c": 0.13521,
    "h": 271.8
  },
  "luminance": 0.02028
}

Semantic roles & 50–950 ramp

primary

#171B6B

secondary

#A19C3D

accent

#E040E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171B6B

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

Preview Lab → · Contrast checker → · Palette generator →