#100C4C#100C4C

#100C4C is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.9% C 0.111 H 274.8°. Best body text is #FFFFFF at 17.81:1 contrast (WCAG AA passes).

Color values

HEX	#100C4C
RGB	rgb(16, 12, 76)
HSL	hsl(244, 73%, 17%)
HSV	hsv(244, 84%, 30%)
CMYK	cmyk(78.9%, 84.2%, 0%, 70.2%)
CIE-LAB	lab(8.08, 25.64, -38.30)
CIE-LCH	lch(8.08, 46.09, 303.80°)
OKLab	oklab(21.87% 0.0094 -0.1108)
OKLCH	oklch(21.87% 0.111 274.8)
XYZ	xyz(1.6492, 0.8947, 6.9219)
Luminance	0.0089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.21

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C4C #484C0C

analogous

#0C284C #100C4C #300C4C

triadic

#100C4C #4C100C #0C4C10

tetradic

#100C4C #4C0C28 #484C0C #0C4C30

square

#100C4C #4C0C28 #484C0C #0C4C30

split-complementary

#100C4C #4C300C #284C0C

monochromatic

#06041A #06041A #100C4C #1B1481 #261DB6

Accessibility & contrast

On white

17.81

#100C4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100C4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C4C

17.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C4C	#FFFFFF	#000000	##FFFFFF
##100C4C	1.00	17.81	1.18	17.81
#FFFFFF	17.81	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4E

Deuteranopia (green-blind)

#00154B

Tritanopia (blue-blind)

#001F2B

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100c4c;
/* rgb */ color: rgb(16, 12, 76);
/* oklch */ color: oklch(21.9% 0.111 274.8);

Tailwind

colors: {
  custom: {
    50: '#5a4c7f',
    500: '#100c4c',
    950: '#000000',
  },
}

SCSS

$custom: #100c4c;
$custom-light: #5a4c7f;
$custom-dark: #000000;

JSON

{
  "hex": "#100c4c",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 76
  },
  "hsl": {
    "h": 243.75,
    "s": 72.727,
    "l": 17.255
  },
  "oklch": {
    "l": 0.21873,
    "c": 0.11116,
    "h": 274.8
  },
  "luminance": 0.00895
}

Semantic roles & 50–950 ramp

primary

#100C4C

secondary

#82882C

accent

#EF38E4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100C4C

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

Preview Lab → · Contrast checker → · Palette generator →