#100F51#100F51

#100F51 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 23.0% C 0.115 H 273.3°. Best body text is #FFFFFF at 17.37:1 contrast (WCAG AA passes).

Color values

HEX#100F51
RGBrgb(16, 15, 81)
HSLhsl(241, 69%, 19%)
HSVhsv(241, 81%, 32%)
CMYKcmyk(80.2%, 81.5%, 0%, 68.2%)
CIE-LABlab(9.37, 25.62, -39.63)
CIE-LCHlch(9.37, 47.19, 302.88°)
OKLaboklab(22.96% 0.0066 -0.1147)
OKLCHoklch(22.96% 0.115 273.3)
XYZxyz(1.8692, 1.0457, 7.8863)
Luminance0.0105 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#100F51 #50510F
analogous
#0F2F51 #100F51 #310F51
triadic
#100F51 #51100F #0F5110
tetradic
#100F51 #510F2F #50510F #0F5131
square
#100F51 #510F2F #50510F #0F5131
split-complementary
#100F51 #51310F #2F510F
monochromatic
#05051A #06051D #100F51 #1A1985 #2422B8

Accessibility & contrast

On white

17.37
#100F51 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.21
#100F51 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F51
17.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##100F51#FFFFFF#000000##FFFFFF
##100F511.0017.371.2117.37
#FFFFFF17.371.0021.001.00
#0000001.2121.001.0021.00
##FFFFFF17.371.0021.001.00

Color blindness preview

Protanopia (red-blind)
#001D53
Deuteranopia (green-blind)
#001750
Tritanopia (blue-blind)
#00222F
Achromatopsia (no color)
#1A1A1A

Design tokens & code

CSS
--color: #100f51;
/* rgb */ color: rgb(16, 15, 81);
/* oklch */ color: oklch(23.0% 0.115 273.3);
Tailwind
colors: {
  custom: {
    50: '#5b4e83',
    500: '#100f51',
    950: '#000000',
  },
}
SCSS
$custom: #100f51;
$custom-light: #5b4e83;
$custom-dark: #000000;
JSON
{
  "hex": "#100f51",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 81
  },
  "hsl": {
    "h": 240.909,
    "s": 68.75,
    "l": 18.824
  },
  "oklch": {
    "l": 0.22962,
    "c": 0.11486,
    "h": 273.3
  },
  "luminance": 0.01046
}

Semantic roles & 50–950 ramp

primary
#100F51
secondary
#8A8B31
accent
#EC3CE9
background
#F5F4F8
surface
#E9E7EF
border
#C5C3CA
text
#04010B
muted
#79777C

Preview Lab

Preview with #100F51

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

Preview Lab → · Contrast checker → · Palette generator →

#100F51 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva