#100D4B#100D4B

#100D4B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.9% C 0.109 H 274.8°. Best body text is #FFFFFF at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#100D4B
RGB	rgb(16, 13, 75)
HSL	hsl(243, 70%, 17%)
HSV	hsv(243, 83%, 29%)
CMYK	cmyk(78.7%, 82.7%, 0%, 70.6%)
CIE-LAB	lab(8.18, 24.64, -37.44)
CIE-LCH	lch(8.18, 44.82, 303.35°)
OKLab	oklab(21.91% 0.0091 -0.1083)
OKLCH	oklch(21.91% 0.109 274.8)
XYZ	xyz(1.6272, 0.9058, 6.7443)
Luminance	0.0091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D4B #484B0D

analogous

#0D294B #100D4B #2F0D4B

triadic

#100D4B #4B100D #0D4B10

tetradic

#100D4B #4B0D29 #484B0D #0D4B2F

square

#100D4B #4B0D29 #484B0D #0D4B2F

split-complementary

#100D4B #4B2F0D #294B0D

monochromatic

#06051A #06051A #100D4B #1B167F #261FB3

Accessibility & contrast

On white

17.78

#100D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D4B

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D4B	#FFFFFF	#000000	##FFFFFF
##100D4B	1.00	17.78	1.18	17.78
#FFFFFF	17.78	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B4D

Deuteranopia (green-blind)

#00154A

Tritanopia (blue-blind)

#001F2B

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100d4b;
/* rgb */ color: rgb(16, 13, 75);
/* oklch */ color: oklch(21.9% 0.109 274.8);

Tailwind

colors: {
  custom: {
    50: '#594c7e',
    500: '#100d4b',
    950: '#000000',
  },
}

SCSS

$custom: #100d4b;
$custom-light: #594c7e;
$custom-dark: #000000;

JSON

{
  "hex": "#100d4b",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 75
  },
  "hsl": {
    "h": 242.903,
    "s": 70.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.21906,
    "c": 0.10865,
    "h": 274.8
  },
  "luminance": 0.00906
}

Semantic roles & 50–950 ramp

primary

#100D4B

secondary

#82862E

accent

#ED3BE5

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100D4B

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

Preview Lab → · Contrast checker → · Palette generator →