#100D4C#100D4C

#100D4C is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.0% C 0.110 H 274.6°. Best body text is #FFFFFF at 17.74:1 contrast (WCAG AA passes).

Color values

HEX	#100D4C
RGB	rgb(16, 13, 76)
HSL	hsl(243, 71%, 17%)
HSV	hsv(243, 83%, 30%)
CMYK	cmyk(78.9%, 82.9%, 0%, 70.2%)
CIE-LAB	lab(8.30, 25.02, -37.94)
CIE-LCH	lch(8.30, 45.44, 303.40°)
OKLab	oklab(22.03% 0.0088 -0.1097)
OKLCH	oklch(22.03% 0.11 274.6)
XYZ	xyz(1.6617, 0.9196, 6.9260)
Luminance	0.0092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.11

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D4C #494C0D

analogous

#0D2A4C #100D4C #2F0D4C

triadic

#100D4C #4C100D #0D4C10

tetradic

#100D4C #4C0D2A #494C0D #0D4C2F

square

#100D4C #4C0D2A #494C0D #0D4C2F

split-complementary

#100D4C #4C2F0D #2A4C0D

monochromatic

#06041A #06041A #100D4C #1B1680 #261FB5

Accessibility & contrast

On white

17.74

#100D4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100D4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D4C

17.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D4C	#FFFFFF	#000000	##FFFFFF
##100D4C	1.00	17.74	1.18	17.74
#FFFFFF	17.74	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4E

Deuteranopia (green-blind)

#00154B

Tritanopia (blue-blind)

#001F2C

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100d4c;
/* rgb */ color: rgb(16, 13, 76);
/* oklch */ color: oklch(22.0% 0.110 274.6);

Tailwind

colors: {
  custom: {
    50: '#5a4c7f',
    500: '#100d4c',
    950: '#000000',
  },
}

SCSS

$custom: #100d4c;
$custom-light: #5a4c7f;
$custom-dark: #000000;

JSON

{
  "hex": "#100d4c",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 76
  },
  "hsl": {
    "h": 242.857,
    "s": 70.787,
    "l": 17.451
  },
  "oklch": {
    "l": 0.22029,
    "c": 0.11006,
    "h": 274.6
  },
  "luminance": 0.0092
}

Semantic roles & 50–950 ramp

primary

#100D4C

secondary

#83872E

accent

#EE3AE5

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100D4C

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

Preview Lab → · Contrast checker → · Palette generator →