#170C55#170C55

#170C55 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.6% C 0.122 H 278.4°. Best body text is #FFFFFF at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#170C55
RGB	rgb(23, 12, 85)
HSL	hsl(249, 75%, 19%)
HSV	hsv(249, 86%, 33%)
CMYK	cmyk(72.9%, 85.9%, 0%, 66.7%)
CIE-LAB	lab(9.80, 29.61, -41.63)
CIE-LCH	lch(9.80, 51.08, 305.42°)
OKLab	oklab(23.56% 0.0177 -0.1202)
OKLCH	oklch(23.56% 0.122 278.4)
XYZ	xyz(2.1240, 1.1008, 8.6931)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C55 #4A550C

analogous

#0C2655 #170C55 #3C0C55

triadic

#170C55 #55170C #0C5517

tetradic

#170C55 #550C26 #4A550C #0C553C

square

#170C55 #550C26 #4A550C #0C553C

split-complementary

#170C55 #553C0C #26550C

monochromatic

#07041B #08041F #170C55 #26148B #341BC0

Accessibility & contrast

On white

17.21

#170C55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#170C55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C55

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C55	#FFFFFF	#000000	##FFFFFF
##170C55	1.00	17.21	1.22	17.21
#FFFFFF	17.21	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E57

Deuteranopia (green-blind)

#001854

Tritanopia (blue-blind)

#002231

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170c55;
/* rgb */ color: rgb(23, 12, 85);
/* oklch */ color: oklch(23.6% 0.122 278.4);

Tailwind

colors: {
  custom: {
    50: '#5f4d86',
    500: '#170c55',
    950: '#000000',
  },
}

SCSS

$custom: #170c55;
$custom-light: #5f4d86;
$custom-dark: #000000;

JSON

{
  "hex": "#170c55",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 85
  },
  "hsl": {
    "h": 249.041,
    "s": 75.258,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23563,
    "c": 0.12155,
    "h": 278.4
  },
  "luminance": 0.01101
}

Semantic roles & 50–950 ramp

primary

#170C55

secondary

#81902D

accent

#F236D6

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #170C55

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

Preview Lab → · Contrast checker → · Palette generator →