#100F5C#100F5C

#100F5C is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.3% C 0.130 H 271.8°. Best body text is #FFFFFF at 16.87:1 contrast (WCAG AA passes).

Color values

HEX	#100F5C
RGB	rgb(16, 15, 92)
HSL	hsl(241, 72%, 21%)
HSV	hsv(241, 84%, 36%)
CMYK	cmyk(82.6%, 83.7%, 0%, 63.9%)
CIE-LAB	lab(10.74, 29.71, -44.85)
CIE-LCH	lch(10.74, 53.80, 303.52°)
OKLab	oklab(24.33% 0.0041 -0.1298)
OKLCH	oklch(24.33% 0.13 271.8)
XYZ	xyz(2.3156, 1.2243, 10.2374)
Luminance	0.0123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F5C #5B5C0F

analogous

#0F345C #100F5C #360F5C

triadic

#100F5C #5C100F #0F5C10

tetradic

#100F5C #5C0F34 #5B5C0F #0F5C36

square

#100F5C #5C0F34 #5B5C0F #0F5C36

split-complementary

#100F5C #5C360F #345C0F

monochromatic

#05041A #070627 #100F5C #191891 #2220C5

Accessibility & contrast

On white

16.87

#100F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#100F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F5C

16.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F5C	#FFFFFF	#000000	##FFFFFF
##100F5C	1.00	16.87	1.24	16.87
#FFFFFF	16.87	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215E

Deuteranopia (green-blind)

#00195B

Tritanopia (blue-blind)

#002735

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #100f5c;
/* rgb */ color: rgb(16, 15, 92);
/* oklch */ color: oklch(24.3% 0.130 271.8);

Tailwind

colors: {
  custom: {
    50: '#5e4f8b',
    500: '#100f5c',
    950: '#000000',
  },
}

SCSS

$custom: #100f5c;
$custom-light: #5e4f8b;
$custom-dark: #000000;

JSON

{
  "hex": "#100f5c",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 92
  },
  "hsl": {
    "h": 240.779,
    "s": 71.963,
    "l": 20.98
  },
  "oklch": {
    "l": 0.2433,
    "c": 0.12988,
    "h": 271.8
  },
  "luminance": 0.01225
}

Semantic roles & 50–950 ramp

primary

#100F5C

secondary

#949531

accent

#EF39EC

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05020C

muted

#79787D

Preview Lab

Preview with #100F5C

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

Preview Lab → · Contrast checker → · Palette generator →