#170D55#170D55

#170D55 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.7% C 0.121 H 278.2°. Best body text is #FFFFFF at 17.14:1 contrast (WCAG AA passes).

Color values

HEX	#170D55
RGB	rgb(23, 13, 85)
HSL	hsl(248, 73%, 19%)
HSV	hsv(248, 85%, 33%)
CMYK	cmyk(72.9%, 84.7%, 0%, 66.7%)
CIE-LAB	lab(10.00, 29.05, -41.31)
CIE-LCH	lch(10.00, 50.50, 305.12°)
OKLab	oklab(23.7% 0.0172 -0.1193)
OKLCH	oklch(23.7% 0.121 278.2)
XYZ	xyz(2.1364, 1.1257, 8.6973)
Luminance	0.0113 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170D55 #4B550D

analogous

#0D2755 #170D55 #3B0D55

triadic

#170D55 #55170D #0D5517

tetradic

#170D55 #550D27 #4B550D #0D553B

square

#170D55 #550D27 #4B550D #0D553B

split-complementary

#170D55 #553B0D #27550D

monochromatic

#07041B #090520 #170D55 #25158A #341DBF

Accessibility & contrast

On white

17.14

#170D55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#170D55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170D55

17.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170D55	#FFFFFF	#000000	##FFFFFF
##170D55	1.00	17.14	1.23	17.14
#FFFFFF	17.14	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E57

Deuteranopia (green-blind)

#001854

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170d55;
/* rgb */ color: rgb(23, 13, 85);
/* oklch */ color: oklch(23.7% 0.121 278.2);

Tailwind

colors: {
  custom: {
    50: '#5f4e86',
    500: '#170d55',
    950: '#000000',
  },
}

SCSS

$custom: #170d55;
$custom-light: #5f4e86;
$custom-dark: #000000;

JSON

{
  "hex": "#170d55",
  "rgb": {
    "r": 23,
    "g": 13,
    "b": 85
  },
  "hsl": {
    "h": 248.333,
    "s": 73.469,
    "l": 19.216
  },
  "oklch": {
    "l": 0.23698,
    "c": 0.12056,
    "h": 278.2
  },
  "luminance": 0.01126
}

Semantic roles & 50–950 ramp

primary

#170D55

secondary

#82902E

accent

#F038D7

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #170D55

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

Preview Lab → · Contrast checker → · Palette generator →