#170B56#170B56

#170B56 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.6% C 0.124 H 278.3°. Best body text is #FFFFFF at 17.23:1 contrast (WCAG AA passes).

Color values

HEX	#170B56
RGB	rgb(23, 11, 86)
HSL	hsl(250, 77%, 19%)
HSV	hsv(250, 87%, 34%)
CMYK	cmyk(73.3%, 87.2%, 0%, 66.3%)
CIE-LAB	lab(9.74, 30.49, -42.41)
CIE-LCH	lch(9.74, 52.23, 305.71°)
OKLab	oklab(23.56% 0.0179 -0.1225)
OKLCH	oklch(23.56% 0.124 278.3)
XYZ	xyz(2.1522, 1.0932, 8.8999)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170B56 #4A560B

analogous

#0B2556 #170B56 #3D0B56

triadic

#170B56 #56170B #0B5617

tetradic

#170B56 #560B25 #4A560B #0B563D

square

#170B56 #560B25 #4A560B #0B563D

split-complementary

#170B56 #563D0B #25560B

monochromatic

#07031B #080420 #170B56 #26128C #3419C3

Accessibility & contrast

On white

17.23

#170B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#170B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170B56

17.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170B56	#FFFFFF	#000000	##FFFFFF
##170B56	1.00	17.23	1.22	17.23
#FFFFFF	17.23	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E58

Deuteranopia (green-blind)

#001855

Tritanopia (blue-blind)

#002231

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170b56;
/* rgb */ color: rgb(23, 11, 86);
/* oklch */ color: oklch(23.6% 0.124 278.3);

Tailwind

colors: {
  custom: {
    50: '#604d87',
    500: '#170b56',
    950: '#000000',
  },
}

SCSS

$custom: #170b56;
$custom-light: #604d87;
$custom-dark: #000000;

JSON

{
  "hex": "#170b56",
  "rgb": {
    "r": 23,
    "g": 11,
    "b": 86
  },
  "hsl": {
    "h": 249.6,
    "s": 77.32,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23559,
    "c": 0.12381,
    "h": 278.3
  },
  "luminance": 0.01093
}

Semantic roles & 50–950 ramp

primary

#170B56

secondary

#81912B

accent

#F434D5

background

#F6F4F8

surface

#EBE7EF

border

#C6C3CA

text

#05010B

muted

#7A777C

Preview Lab

Preview with #170B56

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

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