#100F4B#100F4B

#100F4B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.106 H 274.2°. Best body text is #FFFFFF at 17.62:1 contrast (WCAG AA passes).

Color values

HEX#100F4B
RGBrgb(16, 15, 75)
HSLhsl(241, 67%, 18%)
HSVhsv(241, 80%, 29%)
CMYKcmyk(78.7%, 80%, 0%, 70.6%)
CIE-LABlab(8.65, 23.32, -36.67)
CIE-LCHlch(8.65, 43.46, 302.46°)
OKLaboklab(22.24% 0.0078 -0.106)
OKLCHoklch(22.24% 0.106 274.2)
XYZxyz(1.6541, 0.9596, 6.7533)
Luminance0.0096 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#100F4B #4A4B0F
analogous
#0F2C4B #100F4B #2E0F4B
triadic
#100F4B #4B100F #0F4B10
tetradic
#100F4B #4B0F2C #4A4B0F #0F4B2E
square
#100F4B #4B0F2C #4A4B0F #0F4B2E
split-complementary
#100F4B #4B2E0F #2C4B0F
monochromatic
#05051A #05051A #100F4B #1B197E #2623B1

Accessibility & contrast

On white

17.62
#100F4B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.19
#100F4B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F4B
17.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##100F4B#FFFFFF#000000##FFFFFF
##100F4B1.0017.621.1917.62
#FFFFFF17.621.0021.001.00
#0000001.1921.001.0021.00
##FFFFFF17.621.0021.001.00

Color blindness preview

Protanopia (red-blind)
#001C4D
Deuteranopia (green-blind)
#00164A
Tritanopia (blue-blind)
#00202C
Achromatopsia (no color)
#191919

Design tokens & code

CSS
--color: #100f4b;
/* rgb */ color: rgb(16, 15, 75);
/* oklch */ color: oklch(22.2% 0.106 274.2);
Tailwind
colors: {
  custom: {
    50: '#594e7e',
    500: '#100f4b',
    950: '#000000',
  },
}
SCSS
$custom: #100f4b;
$custom-light: #594e7e;
$custom-dark: #000000;
JSON
{
  "hex": "#100f4b",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 75
  },
  "hsl": {
    "h": 241,
    "s": 66.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.2224,
    "c": 0.10632,
    "h": 274.2
  },
  "luminance": 0.0096
}

Semantic roles & 50–950 ramp

primary
#100F4B
secondary
#848530
accent
#EA3EE7
background
#F5F4F7
surface
#E9E7EE
border
#C5C3C9
text
#04010A
muted
#79777C

Preview Lab

Preview with #100F4B

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

Preview Lab → · Contrast checker → · Palette generator →

#100F4B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva