#100A3F#100A3F

#100A3F is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.0% C 0.095 H 278.5°. Best body text is #FFFFFF at 18.47:1 contrast (WCAG AA passes).

Color values

HEX	#100A3F
RGB	rgb(16, 10, 63)
HSL	hsl(247, 73%, 14%)
HSV	hsv(247, 84%, 25%)
CMYK	cmyk(74.6%, 84.1%, 0%, 75.3%)
CIE-LAB	lab(6.20, 21.37, -32.23)
CIE-LCH	lch(6.20, 38.67, 303.54°)
OKLab	oklab(19.96% 0.014 -0.0938)
OKLCH	oklch(19.96% 0.095 278.5)
XYZ	xyz(1.2191, 0.6860, 4.7698)
Luminance	0.0069 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A3F #393F0A

analogous

#0A1F3F #100A3F #2B0A3F

triadic

#100A3F #3F100A #0A3F10

tetradic

#100A3F #3F0A1F #393F0A #0A3F2B

square

#100A3F #3F0A1F #393F0A #0A3F2B

split-complementary

#100A3F #3F2B0A #1F3F0A

monochromatic

#07041A #07041A #100A3F #1D1274 #2B1BA9

Accessibility & contrast

On white

18.47

#100A3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#100A3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A3F

18.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A3F	#FFFFFF	#000000	##FFFFFF
##100A3F	1.00	18.47	1.14	18.47
#FFFFFF	18.47	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001641

Deuteranopia (green-blind)

#00123E

Tritanopia (blue-blind)

#001924

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #100a3f;
/* rgb */ color: rgb(16, 10, 63);
/* oklch */ color: oklch(20.0% 0.095 278.5);

Tailwind

colors: {
  custom: {
    50: '#564a75',
    500: '#100a3f',
    950: '#000000',
  },
}

SCSS

$custom: #100a3f;
$custom-light: #564a75;
$custom-dark: #000000;

JSON

{
  "hex": "#100a3f",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 63
  },
  "hsl": {
    "h": 246.792,
    "s": 72.603,
    "l": 14.314
  },
  "oklch": {
    "l": 0.19959,
    "c": 0.09489,
    "h": 278.5
  },
  "luminance": 0.00686
}

Semantic roles & 50–950 ramp

primary

#100A3F

secondary

#737C29

accent

#EF38DB

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #100A3F

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

Preview Lab → · Contrast checker → · Palette generator →