#100F4B#100F4B

#100F4B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.106 H 274.2°. Best body text is #FFFFFF at 17.62:1 contrast (WCAG AA passes).

Color values

HEX	#100F4B
RGB	rgb(16, 15, 75)
HSL	hsl(241, 67%, 18%)
HSV	hsv(241, 80%, 29%)
CMYK	cmyk(78.7%, 80%, 0%, 70.6%)
CIE-LAB	lab(8.65, 23.32, -36.67)
CIE-LCH	lch(8.65, 43.46, 302.46°)
OKLab	oklab(22.24% 0.0078 -0.106)
OKLCH	oklch(22.24% 0.106 274.2)
XYZ	xyz(1.6541, 0.9596, 6.7533)
Luminance	0.0096 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F4B #4A4B0F

analogous

#0F2C4B #100F4B #2E0F4B

triadic

#100F4B #4B100F #0F4B10

tetradic

#100F4B #4B0F2C #4A4B0F #0F4B2E

square

#100F4B #4B0F2C #4A4B0F #0F4B2E

split-complementary

#100F4B #4B2E0F #2C4B0F

monochromatic

#05051A #05051A #100F4B #1B197E #2623B1

Accessibility & contrast

On white

17.62

#100F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#100F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F4B

17.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F4B	#FFFFFF	#000000	##FFFFFF
##100F4B	1.00	17.62	1.19	17.62
#FFFFFF	17.62	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C4D

Deuteranopia (green-blind)

#00164A

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #100f4b;
/* rgb */ color: rgb(16, 15, 75);
/* oklch */ color: oklch(22.2% 0.106 274.2);

Tailwind

colors: {
  custom: {
    50: '#594e7e',
    500: '#100f4b',
    950: '#000000',
  },
}

SCSS

$custom: #100f4b;
$custom-light: #594e7e;
$custom-dark: #000000;

JSON

{
  "hex": "#100f4b",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 75
  },
  "hsl": {
    "h": 241,
    "s": 66.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.2224,
    "c": 0.10632,
    "h": 274.2
  },
  "luminance": 0.0096
}

Semantic roles & 50–950 ramp

primary

#100F4B

secondary

#848530

accent

#EA3EE7

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100F4B

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

Preview Lab → · Contrast checker → · Palette generator →