#100B56#100B56

#100B56 is a very dark, vivid blue. Relative luminance 0.010; OKLCH L 23.0% C 0.126 H 273.2°. Best body text is #FFFFFF at 17.44:1 contrast (WCAG AA passes).

Color values

HEX	#100B56
RGB	rgb(16, 11, 86)
HSL	hsl(244, 77%, 19%)
HSV	hsv(244, 87%, 34%)
CMYK	cmyk(81.4%, 87.2%, 0%, 66.3%)
CIE-LAB	lab(9.17, 29.85, -43.38)
CIE-LCH	lch(9.17, 52.66, 304.53°)
OKLab	oklab(23.01% 0.0071 -0.1255)
OKLCH	oklch(23.01% 0.126 273.2)
XYZ	xyz(2.0125, 1.0212, 8.8933)
Luminance	0.0102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B56 #51560B

analogous

#0B2C56 #100B56 #360B56

triadic

#100B56 #56100B #0B5610

tetradic

#100B56 #560B2C #51560B #0B5636

square

#100B56 #560B2C #51560B #0B5636

split-complementary

#100B56 #56360B #2C560B

monochromatic

#05031B #060420 #100B56 #1A128C #2419C3

Accessibility & contrast

On white

17.44

#100B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#100B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B56

17.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B56	#FFFFFF	#000000	##FFFFFF
##100B56	1.00	17.44	1.20	17.44
#FFFFFF	17.44	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D58

Deuteranopia (green-blind)

#001655

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100b56;
/* rgb */ color: rgb(16, 11, 86);
/* oklch */ color: oklch(23.0% 0.126 273.2);

Tailwind

colors: {
  custom: {
    50: '#5d4c87',
    500: '#100b56',
    950: '#000000',
  },
}

SCSS

$custom: #100b56;
$custom-light: #5d4c87;
$custom-dark: #000000;

JSON

{
  "hex": "#100b56",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 86
  },
  "hsl": {
    "h": 244,
    "s": 77.32,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23008,
    "c": 0.12571,
    "h": 273.2
  },
  "luminance": 0.01021
}

Semantic roles & 50–950 ramp

primary

#100B56

secondary

#8B912B

accent

#F434E7

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100B56

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

Preview Lab → · Contrast checker → · Palette generator →