#100C55#100C55

#100C55 is a very dark, vivid blue. Relative luminance 0.010; OKLCH L 23.0% C 0.123 H 273.3°. Best body text is #FFFFFF at 17.42:1 contrast (WCAG AA passes).

Color values

HEX	#100C55
RGB	rgb(16, 12, 85)
HSL	hsl(243, 75%, 19%)
HSV	hsv(243, 86%, 33%)
CMYK	cmyk(81.2%, 85.9%, 0%, 66.7%)
CIE-LAB	lab(9.23, 28.93, -42.60)
CIE-LCH	lch(9.23, 51.49, 304.18°)
OKLab	oklab(23.01% 0.007 -0.1232)
OKLCH	oklch(23.01% 0.123 273.3)
XYZ	xyz(1.9843, 1.0288, 8.6866)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C55 #51550C

analogous

#0C2D55 #100C55 #350C55

triadic

#100C55 #55100C #0C5510

tetradic

#100C55 #550C2D #51550C #0C5535

square

#100C55 #550C2D #51550C #0C5535

split-complementary

#100C55 #55350C #2D550C

monochromatic

#05041B #06041F #100C55 #1A148B #241BC0

Accessibility & contrast

On white

17.42

#100C55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#100C55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C55

17.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C55	#FFFFFF	#000000	##FFFFFF
##100C55	1.00	17.42	1.21	17.42
#FFFFFF	17.42	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D57

Deuteranopia (green-blind)

#001654

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100c55;
/* rgb */ color: rgb(16, 12, 85);
/* oklch */ color: oklch(23.0% 0.123 273.3);

Tailwind

colors: {
  custom: {
    50: '#5d4c86',
    500: '#100c55',
    950: '#000000',
  },
}

SCSS

$custom: #100c55;
$custom-light: #5d4c86;
$custom-dark: #000000;

JSON

{
  "hex": "#100c55",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 85
  },
  "hsl": {
    "h": 243.288,
    "s": 75.258,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23013,
    "c": 0.12345,
    "h": 273.3
  },
  "luminance": 0.01029
}

Semantic roles & 50–950 ramp

primary

#100C55

secondary

#8B902D

accent

#F236E8

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100C55

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

Preview Lab → · Contrast checker → · Palette generator →