#100A3B#100A3B

#100A3B is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.5% C 0.089 H 279.7°. Best body text is #FFFFFF at 18.61:1 contrast (WCAG AA passes).

Color values

HEX	#100A3B
RGB	rgb(16, 10, 59)
HSL	hsl(247, 71%, 14%)
HSV	hsv(247, 83%, 23%)
CMYK	cmyk(72.9%, 83.1%, 0%, 76.9%)
CIE-LAB	lab(5.81, 19.49, -29.99)
CIE-LCH	lch(5.81, 35.77, 303.02°)
OKLab	oklab(19.48% 0.015 -0.0877)
OKLCH	oklch(19.48% 0.089 279.7)
XYZ	xyz(1.1114, 0.6429, 4.2024)
Luminance	0.0064 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A3B #353B0A

analogous

#0A1C3B #100A3B #280A3B

triadic

#100A3B #3B100A #0A3B10

tetradic

#100A3B #3B0A1C #353B0A #0A3B28

square

#100A3B #3B0A1C #353B0A #0A3B28

split-complementary

#100A3B #3B280A #1C3B0A

monochromatic

#07041A #07041A #100A3B #1E136F #2C1CA4

Accessibility & contrast

On white

18.61

#100A3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#100A3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A3B

18.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A3B	#FFFFFF	#000000	##FFFFFF
##100A3B	1.00	18.61	1.13	18.61
#FFFFFF	18.61	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153C

Deuteranopia (green-blind)

#00113A

Tritanopia (blue-blind)

#001821

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #100a3b;
/* rgb */ color: rgb(16, 10, 59);
/* oklch */ color: oklch(19.5% 0.089 279.7);

Tailwind

colors: {
  custom: {
    50: '#554a71',
    500: '#100a3b',
    950: '#000000',
  },
}

SCSS

$custom: #100a3b;
$custom-light: #554a71;
$custom-dark: #000000;

JSON

{
  "hex": "#100a3b",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 59
  },
  "hsl": {
    "h": 247.347,
    "s": 71.014,
    "l": 13.529
  },
  "oklch": {
    "l": 0.19482,
    "c": 0.08899,
    "h": 279.7
  },
  "luminance": 0.00643
}

Semantic roles & 50–950 ramp

primary

#100A3B

secondary

#6F7828

accent

#EE3AD8

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030108

muted

#78777B

Preview Lab

Preview with #100A3B

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

Preview Lab → · Contrast checker → · Palette generator →