#1B104A#1B104A

#1B104A is a very dark, moderate violet. Relative luminance 0.011; OKLCH L 23.3% C 0.101 H 284.0°. Best body text is #FFFFFF at 17.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B104A
RGB	rgb(27, 16, 74)
HSL	hsl(251, 64%, 18%)
HSV	hsv(251, 78%, 29%)
CMYK	cmyk(63.5%, 78.4%, 0%, 71%)
CIE-LAB	lab(9.78, 23.92, -34.08)
CIE-LCH	lch(9.78, 41.63, 305.07°)
OKLab	oklab(23.27% 0.0244 -0.0981)
OKLCH	oklch(23.27% 0.101 284)
XYZ	xyz(1.8729, 1.0979, 6.5905)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B104A #3F4A10

analogous

#10224A #1B104A #38104A

triadic

#1B104A #4A1B10 #104A1B

tetradic

#1B104A #4A1022 #3F4A10 #104A38

square

#1B104A #4A1022 #3F4A10 #104A38

split-complementary

#1B104A #4A3810 #224A10

monochromatic

#090519 #090519 #1B104A #2D1B7C #4026AF

Accessibility & contrast

On white

17.22

#1B104A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#1B104A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B104A

17.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B104A	#FFFFFF	#000000	##FFFFFF
##1B104A	1.00	17.22	1.22	17.22
#FFFFFF	17.22	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D4C

Deuteranopia (green-blind)

#001949

Tritanopia (blue-blind)

#04202B

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #1b104a;
/* rgb */ color: rgb(27, 16, 74);
/* oklch */ color: oklch(23.3% 0.101 284.0);

Tailwind

colors: {
  custom: {
    50: '#5e4f7d',
    500: '#1b104a',
    950: '#000000',
  },
}

SCSS

$custom: #1b104a;
$custom-light: #5e4f7d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b104a",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 74
  },
  "hsl": {
    "h": 251.379,
    "s": 64.444,
    "l": 17.647
  },
  "oklch": {
    "l": 0.23267,
    "c": 0.10109,
    "h": 284
  },
  "luminance": 0.01098
}

Semantic roles & 50–950 ramp

primary

#1B104A

secondary

#748432

accent

#E740C8

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #1B104A

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

Preview Lab → · Contrast checker → · Palette generator →