#100F4D#100F4D

#100F4D is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.5% C 0.109 H 273.9°. Best body text is #FFFFFF at 17.54:1 contrast (WCAG AA passes).

Color values

HEX	#100F4D
RGB	rgb(16, 15, 77)
HSL	hsl(241, 67%, 18%)
HSV	hsv(241, 81%, 30%)
CMYK	cmyk(79.2%, 80.5%, 0%, 69.8%)
CIE-LAB	lab(8.89, 24.09, -37.67)
CIE-LCH	lch(8.89, 44.71, 302.60°)
OKLab	oklab(22.48% 0.0074 -0.1089)
OKLCH	oklch(22.48% 0.109 273.9)
XYZ	xyz(1.7236, 0.9875, 7.1195)
Luminance	0.0099 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F4D #4C4D0F

analogous

#0F2D4D #100F4D #2F0F4D

triadic

#100F4D #4D100F #0F4D10

tetradic

#100F4D #4D0F2D #4C4D0F #0F4D2F

square

#100F4D #4D0F2D #4C4D0F #0F4D2F

split-complementary

#100F4D #4D2F0F #2D4D0F

monochromatic

#05051A #05051A #100F4D #1B1980 #2523B3

Accessibility & contrast

On white

17.54

#100F4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#100F4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F4D

17.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F4D	#FFFFFF	#000000	##FFFFFF
##100F4D	1.00	17.54	1.20	17.54
#FFFFFF	17.54	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C4F

Deuteranopia (green-blind)

#00164C

Tritanopia (blue-blind)

#00212D

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #100f4d;
/* rgb */ color: rgb(16, 15, 77);
/* oklch */ color: oklch(22.5% 0.109 273.9);

Tailwind

colors: {
  custom: {
    50: '#5a4e80',
    500: '#100f4d',
    950: '#000000',
  },
}

SCSS

$custom: #100f4d;
$custom-light: #5a4e80;
$custom-dark: #000000;

JSON

{
  "hex": "#100f4d",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 77
  },
  "hsl": {
    "h": 240.968,
    "s": 67.391,
    "l": 18.039
  },
  "oklch": {
    "l": 0.22479,
    "c": 0.10919,
    "h": 273.9
  },
  "luminance": 0.00988
}

Semantic roles & 50–950 ramp

primary

#100F4D

secondary

#868731

accent

#EA3EE7

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100F4D

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

Preview Lab → · Contrast checker → · Palette generator →