#171B6E#171B6E

#171B6E is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.8% C 0.139 H 271.6°. Best body text is #FFFFFF at 14.81:1 contrast (WCAG AA passes).

Color values

HEX	#171B6E
RGB	rgb(23, 27, 110)
HSL	hsl(237, 65%, 26%)
HSV	hsv(237, 79%, 43%)
CMYK	cmyk(79.1%, 75.5%, 0%, 56.9%)
CIE-LAB	lab(15.96, 29.52, -48.11)
CIE-LCH	lch(15.96, 56.44, 301.53°)
OKLab	oklab(28.78% 0.0038 -0.1393)
OKLCH	oklch(28.78% 0.139 271.6)
XYZ	xyz(3.5588, 2.0914, 14.9650)
Luminance	0.0209 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6E #6E6A17

analogous

#17466E #171B6E #3E176E

triadic

#171B6E #6E171B #1B6E17

tetradic

#171B6E #6E1746 #6E6A17 #176E3E

square

#171B6E #6E1746 #6E6A17 #176E3E

split-complementary

#171B6E #6E3E17 #466E17

monochromatic

#050619 #0C0F3B #171B6E #2227A1 #2C34D3

Accessibility & contrast

On white

14.81

#171B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6E

14.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6E	#FFFFFF	#000000	##FFFFFF
##171B6E	1.00	14.81	1.42	14.81
#FFFFFF	14.81	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C70

Deuteranopia (green-blind)

#00236D

Tritanopia (blue-blind)

#003342

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171b6e;
/* rgb */ color: rgb(23, 27, 110);
/* oklch */ color: oklch(28.8% 0.139 271.6);

Tailwind

colors: {
  custom: {
    50: '#645899',
    500: '#171b6e',
    950: '#000000',
  },
}

SCSS

$custom: #171b6e;
$custom-light: #645899;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 110
  },
  "hsl": {
    "h": 237.241,
    "s": 65.414,
    "l": 26.078
  },
  "oklch": {
    "l": 0.28784,
    "c": 0.1393,
    "h": 271.6
  },
  "luminance": 0.02092
}

Semantic roles & 50–950 ramp

primary

#171B6E

secondary

#A49F3D

accent

#E13FE8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #171B6E

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

Preview Lab → · Contrast checker → · Palette generator →