#171B6F#171B6F

#171B6F is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.9% C 0.141 H 271.5°. Best body text is #FFFFFF at 14.76:1 contrast (WCAG AA passes).

Color values

HEX	#171B6F
RGB	rgb(23, 27, 111)
HSL	hsl(237, 66%, 26%)
HSV	hsv(237, 79%, 44%)
CMYK	cmyk(79.3%, 75.7%, 0%, 56.5%)
CIE-LAB	lab(16.07, 29.89, -48.58)
CIE-LCH	lch(16.07, 57.04, 301.60°)
OKLab	oklab(28.9% 0.0036 -0.1406)
OKLCH	oklch(28.9% 0.141 271.5)
XYZ	xyz(3.6136, 2.1133, 15.2533)
Luminance	0.0211 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6F #6F6B17

analogous

#17476F #171B6F #3F176F

triadic

#171B6F #6F171B #1B6F17

tetradic

#171B6F #6F1747 #6F6B17 #176F3F

square

#171B6F #6F1747 #6F6B17 #176F3F

split-complementary

#171B6F #6F3F17 #476F17

monochromatic

#050619 #0C0F3C #171B6F #2227A2 #2D34D3

Accessibility & contrast

On white

14.76

#171B6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171B6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6F

14.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6F	#FFFFFF	#000000	##FFFFFF
##171B6F	1.00	14.76	1.42	14.76
#FFFFFF	14.76	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C71

Deuteranopia (green-blind)

#00246D

Tritanopia (blue-blind)

#003343

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171b6f;
/* rgb */ color: rgb(23, 27, 111);
/* oklch */ color: oklch(28.9% 0.141 271.5);

Tailwind

colors: {
  custom: {
    50: '#655899',
    500: '#171b6f',
    950: '#000000',
  },
}

SCSS

$custom: #171b6f;
$custom-light: #655899;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6f",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 111
  },
  "hsl": {
    "h": 237.273,
    "s": 65.672,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28897,
    "c": 0.14066,
    "h": 271.5
  },
  "luminance": 0.02114
}

Semantic roles & 50–950 ramp

primary

#171B6F

secondary

#A5A03D

accent

#E13FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #171B6F

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

Preview Lab → · Contrast checker → · Palette generator →