#100F4F#100F4F

#100F4F is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.7% C 0.112 H 273.6°. Best body text is #FFFFFF at 17.45:1 contrast (WCAG AA passes).

Color values

HEX	#100F4F
RGB	rgb(16, 15, 79)
HSL	hsl(241, 68%, 18%)
HSV	hsv(241, 81%, 31%)
CMYK	cmyk(79.7%, 81%, 0%, 69%)
CIE-LAB	lab(9.12, 24.86, -38.66)
CIE-LCH	lch(9.12, 45.96, 302.75°)
OKLab	oklab(22.72% 0.007 -0.1118)
OKLCH	oklch(22.72% 0.112 273.6)
XYZ	xyz(1.7953, 1.0161, 7.4971)
Luminance	0.0102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.46

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F4F #4E4F0F

analogous

#0F2E4F #100F4F #300F4F

triadic

#100F4F #4F100F #0F4F10

tetradic

#100F4F #4F0F2E #4E4F0F #0F4F30

square

#100F4F #4F0F2E #4E4F0F #0F4F30

split-complementary

#100F4F #4F300F #2E4F0F

monochromatic

#05051A #06051C #100F4F #1A1982 #2523B6

Accessibility & contrast

On white

17.45

#100F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#100F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F4F

17.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F4F	#FFFFFF	#000000	##FFFFFF
##100F4F	1.00	17.45	1.20	17.45
#FFFFFF	17.45	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D51

Deuteranopia (green-blind)

#00174E

Tritanopia (blue-blind)

#00212E

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100f4f;
/* rgb */ color: rgb(16, 15, 79);
/* oklch */ color: oklch(22.7% 0.112 273.6);

Tailwind

colors: {
  custom: {
    50: '#5a4e81',
    500: '#100f4f',
    950: '#000000',
  },
}

SCSS

$custom: #100f4f;
$custom-light: #5a4e81;
$custom-dark: #000000;

JSON

{
  "hex": "#100f4f",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 79
  },
  "hsl": {
    "h": 240.938,
    "s": 68.085,
    "l": 18.431
  },
  "oklch": {
    "l": 0.22719,
    "c": 0.11204,
    "h": 273.6
  },
  "luminance": 0.01016
}

Semantic roles & 50–950 ramp

primary

#100F4F

secondary

#888931

accent

#EB3DE8

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#04010A

muted

#79777C

Preview Lab

Preview with #100F4F

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

Preview Lab → · Contrast checker → · Palette generator →