#100D4D#100D4D

#100D4D is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.2% C 0.111 H 274.4°. Best body text is #FFFFFF at 17.69:1 contrast (WCAG AA passes).

Color values

HEX	#100D4D
RGB	rgb(16, 13, 77)
HSL	hsl(243, 71%, 18%)
HSV	hsv(243, 83%, 30%)
CMYK	cmyk(79.2%, 83.1%, 0%, 69.8%)
CIE-LAB	lab(8.43, 25.39, -38.43)
CIE-LCH	lch(8.43, 46.05, 303.45°)
OKLab	oklab(22.15% 0.0086 -0.1111)
OKLCH	oklch(22.15% 0.111 274.4)
XYZ	xyz(1.6967, 0.9337, 7.1105)
Luminance	0.0093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.28

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D4D #4A4D0D

analogous

#0D2A4D #100D4D #300D4D

triadic

#100D4D #4D100D #0D4D10

tetradic

#100D4D #4D0D2A #4A4D0D #0D4D30

square

#100D4D #4D0D2A #4A4D0D #0D4D30

split-complementary

#100D4D #4D300D #2A4D0D

monochromatic

#05041A #05041A #100D4D #1B1681 #261FB6

Accessibility & contrast

On white

17.69

#100D4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#100D4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D4D

17.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D4D	#FFFFFF	#000000	##FFFFFF
##100D4D	1.00	17.69	1.19	17.69
#FFFFFF	17.69	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4F

Deuteranopia (green-blind)

#00154C

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100d4d;
/* rgb */ color: rgb(16, 13, 77);
/* oklch */ color: oklch(22.2% 0.111 274.4);

Tailwind

colors: {
  custom: {
    50: '#5a4c80',
    500: '#100d4d',
    950: '#000000',
  },
}

SCSS

$custom: #100d4d;
$custom-light: #5a4c80;
$custom-dark: #000000;

JSON

{
  "hex": "#100d4d",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 77
  },
  "hsl": {
    "h": 242.813,
    "s": 71.111,
    "l": 17.647
  },
  "oklch": {
    "l": 0.22152,
    "c": 0.11147,
    "h": 274.4
  },
  "luminance": 0.00934
}

Semantic roles & 50–950 ramp

primary

#100D4D

secondary

#84882E

accent

#EE3AE5

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100D4D

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

Preview Lab → · Contrast checker → · Palette generator →