#1B0B4A#1B0B4A

#1B0B4A is a very dark, moderate violet. Relative luminance 0.010; OKLCH L 22.5% C 0.107 H 285.6°. Best body text is #FFFFFF at 17.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B0B4A
RGB	rgb(27, 11, 74)
HSL	hsl(255, 74%, 17%)
HSV	hsv(255, 85%, 29%)
CMYK	cmyk(63.5%, 85.1%, 0%, 71%)
CIE-LAB	lab(8.71, 26.94, -35.83)
CIE-LCH	lch(8.71, 44.83, 306.94°)
OKLab	oklab(22.51% 0.0288 -0.1032)
OKLCH	oklch(22.51% 0.107 285.6)
XYZ	xyz(1.8073, 0.9667, 6.5686)
Luminance	0.0097 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.12

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0B4A #3A4A0B

analogous

#0B1B4A #1B0B4A #3B0B4A

triadic

#1B0B4A #4A1B0B #0B4A1B

tetradic

#1B0B4A #4A0B1B #3A4A0B #0B4A3B

square

#1B0B4A #4A0B1B #3A4A0B #0B4A3B

split-complementary

#1B0B4A #4A3B0B #1B4A0B

monochromatic

#0A041B #0A041B #1B0B4A #2E137F #421BB5

Accessibility & contrast

On white

17.60

#1B0B4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#1B0B4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0B4A

17.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0B4A	#FFFFFF	#000000	##FFFFFF
##1B0B4A	1.00	17.60	1.19	17.60
#FFFFFF	17.60	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4C

Deuteranopia (green-blind)

#001749

Tritanopia (blue-blind)

#041D2A

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #1b0b4a;
/* rgb */ color: rgb(27, 11, 74);
/* oklch */ color: oklch(22.5% 0.107 285.6);

Tailwind

colors: {
  custom: {
    50: '#5f4c7d',
    500: '#1b0b4a',
    950: '#000000',
  },
}

SCSS

$custom: #1b0b4a;
$custom-light: #5f4c7d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0b4a",
  "rgb": {
    "r": 27,
    "g": 11,
    "b": 74
  },
  "hsl": {
    "h": 255.238,
    "s": 74.118,
    "l": 16.667
  },
  "oklch": {
    "l": 0.22511,
    "c": 0.10716,
    "h": 285.6
  },
  "luminance": 0.00967
}

Semantic roles & 50–950 ramp

primary

#1B0B4A

secondary

#6F862B

accent

#F137C2

background

#F5F4F7

surface

#EAE7EE

border

#C6C3C9

text

#05010A

muted

#79777C

Preview Lab

Preview with #1B0B4A

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

Preview Lab → · Contrast checker → · Palette generator →