#170D5B#170D5B

#170D5B is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.4% C 0.129 H 276.8°. Best body text is #FFFFFF at 16.87:1 contrast (WCAG AA passes).

Color values

HEX	#170D5B
RGB	rgb(23, 13, 91)
HSL	hsl(248, 75%, 20%)
HSV	hsv(248, 86%, 36%)
CMYK	cmyk(74.7%, 85.7%, 0%, 64.3%)
CIE-LAB	lab(10.74, 31.12, -44.15)
CIE-LCH	lch(10.74, 54.01, 305.18°)
OKLab	oklab(24.44% 0.0153 -0.1276)
OKLCH	oklch(24.44% 0.129 276.8)
XYZ	xyz(2.3850, 1.2251, 10.0063)
Luminance	0.0123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170D5B #515B0D

analogous

#0D2A5B #170D5B #3E0D5B

triadic

#170D5B #5B170D #0D5B17

tetradic

#170D5B #5B0D2A #515B0D #0D5B3E

square

#170D5B #5B0D2A #515B0D #0D5B3E

split-complementary

#170D5B #5B3E0D #2A5B0D

monochromatic

#07041B #090525 #170D5B #251591 #321CC6

Accessibility & contrast

On white

16.87

#170D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#170D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170D5B

16.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170D5B	#FFFFFF	#000000	##FFFFFF
##170D5B	1.00	16.87	1.24	16.87
#FFFFFF	16.87	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205D

Deuteranopia (green-blind)

#001A5A

Tritanopia (blue-blind)

#002534

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #170d5b;
/* rgb */ color: rgb(23, 13, 91);
/* oklch */ color: oklch(24.4% 0.129 276.8);

Tailwind

colors: {
  custom: {
    50: '#614e8a',
    500: '#170d5b',
    950: '#000000',
  },
}

SCSS

$custom: #170d5b;
$custom-light: #614e8a;
$custom-dark: #000000;

JSON

{
  "hex": "#170d5b",
  "rgb": {
    "r": 23,
    "g": 13,
    "b": 91
  },
  "hsl": {
    "h": 247.692,
    "s": 75,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24435,
    "c": 0.12851,
    "h": 276.8
  },
  "luminance": 0.01225
}

Semantic roles & 50–950 ramp

primary

#170D5B

secondary

#88952F

accent

#F236DA

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #170D5B

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

Preview Lab → · Contrast checker → · Palette generator →