#100A3A#100A3A

#100A3A is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.4% C 0.087 H 280.1°. Best body text is #FFFFFF at 18.64:1 contrast (WCAG AA passes).

Color values

HEX	#100A3A
RGB	rgb(16, 10, 58)
HSL	hsl(248, 71%, 13%)
HSV	hsv(248, 83%, 23%)
CMYK	cmyk(72.4%, 82.8%, 0%, 77.3%)
CIE-LAB	lab(5.71, 19.01, -29.42)
CIE-LCH	lch(5.71, 35.03, 302.87°)
OKLab	oklab(19.36% 0.0153 -0.0861)
OKLCH	oklch(19.36% 0.087 280.1)
XYZ	xyz(1.0857, 0.6326, 4.0671)
Luminance	0.0063 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A3A #343A0A

analogous

#0A1C3A #100A3A #280A3A

triadic

#100A3A #3A100A #0A3A10

tetradic

#100A3A #3A0A1C #343A0A #0A3A28

square

#100A3A #3A0A1C #343A0A #0A3A28

split-complementary

#100A3A #3A280A #1C3A0A

monochromatic

#07051A #07051A #100A3A #1E136E #2D1CA2

Accessibility & contrast

On white

18.64

#100A3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#100A3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A3A

18.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A3A	#FFFFFF	#000000	##FFFFFF
##100A3A	1.00	18.64	1.13	18.64
#FFFFFF	18.64	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00143B

Deuteranopia (green-blind)

#001139

Tritanopia (blue-blind)

#001721

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #100a3a;
/* rgb */ color: rgb(16, 10, 58);
/* oklch */ color: oklch(19.4% 0.087 280.1);

Tailwind

colors: {
  custom: {
    50: '#544a71',
    500: '#100a3a',
    950: '#000000',
  },
}

SCSS

$custom: #100a3a;
$custom-light: #544a71;
$custom-dark: #000000;

JSON

{
  "hex": "#100a3a",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 58
  },
  "hsl": {
    "h": 247.5,
    "s": 70.588,
    "l": 13.333
  },
  "oklch": {
    "l": 0.19365,
    "c": 0.08749,
    "h": 280.1
  },
  "luminance": 0.00633
}

Semantic roles & 50–950 ramp

primary

#100A3A

secondary

#6E7728

accent

#ED3AD7

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030107

muted

#78777A

Preview Lab

Preview with #100A3A

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

Preview Lab → · Contrast checker → · Palette generator →