#100D4A#100D4A

#100D4A is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.8% C 0.107 H 275.0°. Best body text is #FFFFFF at 17.82:1 contrast (WCAG AA passes).

Color values

HEX	#100D4A
RGB	rgb(16, 13, 74)
HSL	hsl(243, 70%, 17%)
HSV	hsv(243, 82%, 29%)
CMYK	cmyk(78.4%, 82.4%, 0%, 71%)
CIE-LAB	lab(8.06, 24.26, -36.94)
CIE-LCH	lch(8.06, 44.20, 303.29°)
OKLab	oklab(21.78% 0.0093 -0.1068)
OKLCH	oklch(21.78% 0.107 275)
XYZ	xyz(1.5932, 0.8923, 6.5655)
Luminance	0.0089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D4A #474A0D

analogous

#0D294A #100D4A #2F0D4A

triadic

#100D4A #4A100D #0D4A10

tetradic

#100D4A #4A0D29 #474A0D #0D4A2F

square

#100D4A #4A0D29 #474A0D #0D4A2F

split-complementary

#100D4A #4A2F0D #294A0D

monochromatic

#06051A #06051A #100D4A #1B167E #271FB2

Accessibility & contrast

On white

17.82

#100D4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100D4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D4A

17.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D4A	#FFFFFF	#000000	##FFFFFF
##100D4A	1.00	17.82	1.18	17.82
#FFFFFF	17.82	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A4C

Deuteranopia (green-blind)

#001549

Tritanopia (blue-blind)

#001F2A

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100d4a;
/* rgb */ color: rgb(16, 13, 74);
/* oklch */ color: oklch(21.8% 0.107 275.0);

Tailwind

colors: {
  custom: {
    50: '#594c7d',
    500: '#100d4a',
    950: '#000000',
  },
}

SCSS

$custom: #100d4a;
$custom-light: #594c7d;
$custom-dark: #000000;

JSON

{
  "hex": "#100d4a",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 74
  },
  "hsl": {
    "h": 242.951,
    "s": 70.115,
    "l": 17.059
  },
  "oklch": {
    "l": 0.21784,
    "c": 0.10723,
    "h": 275
  },
  "luminance": 0.00892
}

Semantic roles & 50–950 ramp

primary

#100D4A

secondary

#81852E

accent

#ED3BE4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100D4A

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

Preview Lab → · Contrast checker → · Palette generator →