#170B31#170B31

#170B31 is a very dark, moderate violet. Relative luminance 0.006; OKLCH L 19.4% C 0.072 H 293.0°. Best body text is #FFFFFF at 18.61:1 contrast (WCAG AA passes).

Color values

HEX	#170B31
RGB	rgb(23, 11, 49)
HSL	hsl(259, 63%, 12%)
HSV	hsv(259, 78%, 19%)
CMYK	cmyk(53.1%, 77.6%, 0%, 80.8%)
CIE-LAB	lab(5.81, 16.54, -22.64)
CIE-LCH	lch(5.81, 28.03, 306.15°)
OKLab	oklab(19.36% 0.028 -0.0659)
OKLCH	oklch(19.36% 0.072 293)
XYZ	xyz(1.0272, 0.6432, 2.9752)
Luminance	0.0064 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Midnight

#03012D

ΔE00 4.95

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170B31 #25310B

analogous

#0B1231 #170B31 #2A0B31

triadic

#170B31 #31170B #0B3117

tetradic

#170B31 #310B12 #25310B #0B312A

square

#170B31 #310B12 #25310B #0B312A

split-complementary

#170B31 #312A0B #12310B

monochromatic

#0C0619 #0C0619 #170B31 #2E1663 #462195

Accessibility & contrast

On white

18.61

#170B31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#170B31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170B31

18.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170B31	#FFFFFF	#000000	##FFFFFF
##170B31	1.00	18.61	1.13	18.61
#FFFFFF	18.61	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001332

Deuteranopia (green-blind)

#001230

Tritanopia (blue-blind)

#10141C

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #170b31;
/* rgb */ color: rgb(23, 11, 49);
/* oklch */ color: oklch(19.4% 0.072 293.0);

Tailwind

colors: {
  custom: {
    50: '#564b69',
    500: '#170b31',
    950: '#000000',
  },
}

SCSS

$custom: #170b31;
$custom-light: #564b69;
$custom-dark: #000000;

JSON

{
  "hex": "#170b31",
  "rgb": {
    "r": 23,
    "g": 11,
    "b": 49
  },
  "hsl": {
    "h": 258.947,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.19355,
    "c": 0.07157,
    "h": 293
  },
  "luminance": 0.00643
}

Semantic roles & 50–950 ramp

primary

#170B31

secondary

#586E2A

accent

#E641B2

background

#F5F4F6

surface

#E9E7EB

border

#C5C3C6

text

#030106

muted

#78777A

Preview Lab

Preview with #170B31

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

Preview Lab → · Contrast checker → · Palette generator →