#171B6D#171B6D

#171B6D is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.7% C 0.138 H 271.6°. Best body text is #FFFFFF at 14.85:1 contrast (WCAG AA passes).

Color values

HEX	#171B6D
RGB	rgb(23, 27, 109)
HSL	hsl(237, 65%, 26%)
HSV	hsv(237, 79%, 43%)
CMYK	cmyk(78.9%, 75.2%, 0%, 57.3%)
CIE-LAB	lab(15.85, 29.14, -47.64)
CIE-LCH	lch(15.85, 55.85, 301.45°)
OKLab	oklab(28.67% 0.0039 -0.1379)
OKLCH	oklch(28.67% 0.138 271.6)
XYZ	xyz(3.5047, 2.0698, 14.6798)
Luminance	0.0207 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6D #6D6917

analogous

#17466D #171B6D #3E176D

triadic

#171B6D #6D171B #1B6D17

tetradic

#171B6D #6D1746 #6D6917 #176D3E

square

#171B6D #6D1746 #6D6917 #176D3E

split-complementary

#171B6D #6D3E17 #466D17

monochromatic

#050619 #0C0E3A #171B6D #2228A0 #2C34D2

Accessibility & contrast

On white

14.85

#171B6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#171B6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6D

14.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6D	#FFFFFF	#000000	##FFFFFF
##171B6D	1.00	14.85	1.41	14.85
#FFFFFF	14.85	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C6F

Deuteranopia (green-blind)

#00236C

Tritanopia (blue-blind)

#003242

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171b6d;
/* rgb */ color: rgb(23, 27, 109);
/* oklch */ color: oklch(28.7% 0.138 271.6);

Tailwind

colors: {
  custom: {
    50: '#645898',
    500: '#171b6d',
    950: '#000000',
  },
}

SCSS

$custom: #171b6d;
$custom-light: #645898;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 109
  },
  "hsl": {
    "h": 237.209,
    "s": 65.152,
    "l": 25.882
  },
  "oklch": {
    "l": 0.28672,
    "c": 0.13795,
    "h": 271.6
  },
  "luminance": 0.0207
}

Semantic roles & 50–950 ramp

primary

#171B6D

secondary

#A39E3D

accent

#E040E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #171B6D

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

Preview Lab → · Contrast checker → · Palette generator →