#100F4C#100F4C

#100F4C is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.4% C 0.108 H 274.0°. Best body text is #FFFFFF at 17.58:1 contrast (WCAG AA passes).

Color values

HEX	#100F4C
RGB	rgb(16, 15, 76)
HSL	hsl(241, 67%, 18%)
HSV	hsv(241, 80%, 30%)
CMYK	cmyk(78.9%, 80.3%, 0%, 70.2%)
CIE-LAB	lab(8.77, 23.71, -37.17)
CIE-LCH	lch(8.77, 44.09, 302.53°)
OKLab	oklab(22.36% 0.0076 -0.1075)
OKLCH	oklch(22.36% 0.108 274)
XYZ	xyz(1.6886, 0.9734, 6.9350)
Luminance	0.0097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F4C #4B4C0F

analogous

#0F2C4C #100F4C #2F0F4C

triadic

#100F4C #4C100F #0F4C10

tetradic

#100F4C #4C0F2C #4B4C0F #0F4C2F

square

#100F4C #4C0F2C #4B4C0F #0F4C2F

split-complementary

#100F4C #4C2F0F #2C4C0F

monochromatic

#05051A #05051A #100F4C #1B197F #2623B2

Accessibility & contrast

On white

17.58

#100F4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#100F4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F4C

17.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F4C	#FFFFFF	#000000	##FFFFFF
##100F4C	1.00	17.58	1.19	17.58
#FFFFFF	17.58	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C4E

Deuteranopia (green-blind)

#00164B

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #100f4c;
/* rgb */ color: rgb(16, 15, 76);
/* oklch */ color: oklch(22.4% 0.108 274.0);

Tailwind

colors: {
  custom: {
    50: '#594e7f',
    500: '#100f4c',
    950: '#000000',
  },
}

SCSS

$custom: #100f4c;
$custom-light: #594e7f;
$custom-dark: #000000;

JSON

{
  "hex": "#100f4c",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 76
  },
  "hsl": {
    "h": 240.984,
    "s": 67.033,
    "l": 17.843
  },
  "oklch": {
    "l": 0.22359,
    "c": 0.10776,
    "h": 274
  },
  "luminance": 0.00974
}

Semantic roles & 50–950 ramp

primary

#100F4C

secondary

#858631

accent

#EA3EE7

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100F4C

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

Preview Lab → · Contrast checker → · Palette generator →