#170C5B#170C5B

#170C5B is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.3% C 0.129 H 277.0°. Best body text is #FFFFFF at 16.94:1 contrast (WCAG AA passes).

Color values

HEX	#170C5B
RGB	rgb(23, 12, 91)
HSL	hsl(248, 77%, 20%)
HSV	hsv(248, 87%, 36%)
CMYK	cmyk(74.7%, 86.8%, 0%, 64.3%)
CIE-LAB	lab(10.56, 31.65, -44.45)
CIE-LCH	lch(10.56, 54.57, 305.45°)
OKLab	oklab(24.31% 0.0158 -0.1284)
OKLCH	oklch(24.31% 0.129 277)
XYZ	xyz(2.3725, 1.2002, 10.0021)
Luminance	0.0120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C5B #505B0C

analogous

#0C295B #170C5B #3E0C5B

triadic

#170C5B #5B170C #0C5B17

tetradic

#170C5B #5B0C29 #505B0C #0C5B3E

square

#170C5B #5B0C29 #505B0C #0C5B3E

split-complementary

#170C5B #5B3E0C #295B0C

monochromatic

#07041B #090525 #170C5B #251391 #321AC7

Accessibility & contrast

On white

16.94

#170C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#170C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C5B

16.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C5B	#FFFFFF	#000000	##FFFFFF
##170C5B	1.00	16.94	1.24	16.94
#FFFFFF	16.94	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205D

Deuteranopia (green-blind)

#00195A

Tritanopia (blue-blind)

#002534

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #170c5b;
/* rgb */ color: rgb(23, 12, 91);
/* oklch */ color: oklch(24.3% 0.129 277.0);

Tailwind

colors: {
  custom: {
    50: '#614d8a',
    500: '#170c5b',
    950: '#000000',
  },
}

SCSS

$custom: #170c5b;
$custom-light: #614d8a;
$custom-dark: #000000;

JSON

{
  "hex": "#170c5b",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 91
  },
  "hsl": {
    "h": 248.354,
    "s": 76.699,
    "l": 20.196
  },
  "oklch": {
    "l": 0.24308,
    "c": 0.12942,
    "h": 277
  },
  "luminance": 0.012
}

Semantic roles & 50–950 ramp

primary

#170C5B

secondary

#87962D

accent

#F335D9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06010C

muted

#7A777D

Preview Lab

Preview with #170C5B

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

Preview Lab → · Contrast checker → · Palette generator →