#100C4A#100C4A

#100C4A is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.6% C 0.108 H 275.2°. Best body text is #FFFFFF at 17.89:1 contrast (WCAG AA passes).

Color values

HEX	#100C4A
RGB	rgb(16, 12, 74)
HSL	hsl(244, 72%, 17%)
HSV	hsv(244, 84%, 29%)
CMYK	cmyk(78.4%, 83.8%, 0%, 71%)
CIE-LAB	lab(7.84, 24.89, -37.32)
CIE-LCH	lch(7.84, 44.86, 303.71°)
OKLab	oklab(21.63% 0.0099 -0.1079)
OKLCH	oklch(21.63% 0.108 275.2)
XYZ	xyz(1.5808, 0.8674, 6.5613)
Luminance	0.0087 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C4A #464A0C

analogous

#0C274A #100C4A #2F0C4A

triadic

#100C4A #4A100C #0C4A10

tetradic

#100C4A #4A0C27 #464A0C #0C4A2F

square

#100C4A #4A0C27 #464A0C #0C4A2F

split-complementary

#100C4A #4A2F0C #274A0C

monochromatic

#06041A #06041A #100C4A #1B157F #271DB3

Accessibility & contrast

On white

17.89

#100C4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#100C4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C4A

17.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C4A	#FFFFFF	#000000	##FFFFFF
##100C4A	1.00	17.89	1.17	17.89
#FFFFFF	17.89	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A4C

Deuteranopia (green-blind)

#001449

Tritanopia (blue-blind)

#001E2A

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100c4a;
/* rgb */ color: rgb(16, 12, 74);
/* oklch */ color: oklch(21.6% 0.108 275.2);

Tailwind

colors: {
  custom: {
    50: '#594c7d',
    500: '#100c4a',
    950: '#000000',
  },
}

SCSS

$custom: #100c4a;
$custom-light: #594c7d;
$custom-dark: #000000;

JSON

{
  "hex": "#100c4a",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 74
  },
  "hsl": {
    "h": 243.871,
    "s": 72.093,
    "l": 16.863
  },
  "oklch": {
    "l": 0.21625,
    "c": 0.10835,
    "h": 275.2
  },
  "luminance": 0.00868
}

Semantic roles & 50–950 ramp

primary

#100C4A

secondary

#80862C

accent

#EF39E3

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100C4A

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

Preview Lab → · Contrast checker → · Palette generator →