#100D55#100D55

#100D55 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.2% C 0.122 H 273.1°. Best body text is #FFFFFF at 17.34:1 contrast (WCAG AA passes).

Color values

HEX	#100D55
RGB	rgb(16, 13, 85)
HSL	hsl(243, 73%, 19%)
HSV	hsv(243, 85%, 33%)
CMYK	cmyk(81.2%, 84.7%, 0%, 66.7%)
CIE-LAB	lab(9.43, 28.35, -42.27)
CIE-LCH	lch(9.43, 50.89, 303.85°)
OKLab	oklab(23.16% 0.0066 -0.1223)
OKLCH	oklch(23.16% 0.122 273.1)
XYZ	xyz(1.9968, 1.0537, 8.6907)
Luminance	0.0105 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D55 #52550D

analogous

#0D2E55 #100D55 #340D55

triadic

#100D55 #55100D #0D5510

tetradic

#100D55 #550D2E #52550D #0D5534

square

#100D55 #550D2E #52550D #0D5534

split-complementary

#100D55 #55340D #2E550D

monochromatic

#05041B #060520 #100D55 #1A158A #241DBF

Accessibility & contrast

On white

17.34

#100D55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#100D55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D55

17.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D55	#FFFFFF	#000000	##FFFFFF
##100D55	1.00	17.34	1.21	17.34
#FFFFFF	17.34	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E57

Deuteranopia (green-blind)

#001754

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100d55;
/* rgb */ color: rgb(16, 13, 85);
/* oklch */ color: oklch(23.2% 0.122 273.1);

Tailwind

colors: {
  custom: {
    50: '#5c4d86',
    500: '#100d55',
    950: '#000000',
  },
}

SCSS

$custom: #100d55;
$custom-light: #5c4d86;
$custom-dark: #000000;

JSON

{
  "hex": "#100d55",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 85
  },
  "hsl": {
    "h": 242.5,
    "s": 73.469,
    "l": 19.216
  },
  "oklch": {
    "l": 0.23155,
    "c": 0.12248,
    "h": 273.1
  },
  "luminance": 0.01054
}

Semantic roles & 50–950 ramp

primary

#100D55

secondary

#8C902E

accent

#F038E8

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100D55

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

Preview Lab → · Contrast checker → · Palette generator →