#100D4E#100D4E

#100D4E is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.3% C 0.113 H 274.2°. Best body text is #FFFFFF at 17.65:1 contrast (WCAG AA passes).

Color values

HEX	#100D4E
RGB	rgb(16, 13, 78)
HSL	hsl(243, 71%, 18%)
HSV	hsv(243, 83%, 31%)
CMYK	cmyk(79.5%, 83.3%, 0%, 69.4%)
CIE-LAB	lab(8.55, 25.77, -38.91)
CIE-LCH	lch(8.55, 46.67, 303.51°)
OKLab	oklab(22.28% 0.0083 -0.1126)
OKLCH	oklch(22.28% 0.113 274.2)
XYZ	xyz(1.7323, 0.9479, 7.2979)
Luminance	0.0095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.45

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D4E #4B4E0D

analogous

#0D2A4E #100D4E #300D4E

triadic

#100D4E #4E100D #0D4E10

tetradic

#100D4E #4E0D2A #4B4E0D #0D4E30

square

#100D4E #4E0D2A #4B4E0D #0D4E30

split-complementary

#100D4E #4E300D #2A4E0D

monochromatic

#05041A #05041A #100D4E #1B1682 #261EB7

Accessibility & contrast

On white

17.65

#100D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#100D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D4E

17.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D4E	#FFFFFF	#000000	##FFFFFF
##100D4E	1.00	17.65	1.19	17.65
#FFFFFF	17.65	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C50

Deuteranopia (green-blind)

#00164D

Tritanopia (blue-blind)

#00202D

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #100d4e;
/* rgb */ color: rgb(16, 13, 78);
/* oklch */ color: oklch(22.3% 0.113 274.2);

Tailwind

colors: {
  custom: {
    50: '#5a4d80',
    500: '#100d4e',
    950: '#000000',
  },
}

SCSS

$custom: #100d4e;
$custom-light: #5a4d80;
$custom-dark: #000000;

JSON

{
  "hex": "#100d4e",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 78
  },
  "hsl": {
    "h": 242.769,
    "s": 71.429,
    "l": 17.843
  },
  "oklch": {
    "l": 0.22276,
    "c": 0.11287,
    "h": 274.2
  },
  "luminance": 0.00948
}

Semantic roles & 50–950 ramp

primary

#100D4E

secondary

#85892E

accent

#EE3AE6

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100D4E

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

Preview Lab → · Contrast checker → · Palette generator →