#100F5D#100F5D

#100F5D is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.5% C 0.131 H 271.7°. Best body text is #FFFFFF at 16.82:1 contrast (WCAG AA passes).

Color values

HEX	#100F5D
RGB	rgb(16, 15, 93)
HSL	hsl(241, 72%, 21%)
HSV	hsv(241, 84%, 36%)
CMYK	cmyk(82.8%, 83.9%, 0%, 63.5%)
CIE-LAB	lab(10.86, 30.07, -45.31)
CIE-LCH	lch(10.86, 54.38, 303.57°)
OKLab	oklab(24.46% 0.0038 -0.1312)
OKLCH	oklch(24.46% 0.131 271.7)
XYZ	xyz(2.3596, 1.2419, 10.4691)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F5D #5C5D0F

analogous

#0F355D #100F5D #370F5D

triadic

#100F5D #5D100F #0F5D10

tetradic

#100F5D #5D0F35 #5C5D0F #0F5D37

square

#100F5D #5D0F35 #5C5D0F #0F5D37

split-complementary

#100F5D #5D370F #355D0F

monochromatic

#05041A #070628 #100F5D #191792 #2220C6

Accessibility & contrast

On white

16.82

#100F5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#100F5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F5D

16.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F5D	#FFFFFF	#000000	##FFFFFF
##100F5D	1.00	16.82	1.25	16.82
#FFFFFF	16.82	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215F

Deuteranopia (green-blind)

#00195C

Tritanopia (blue-blind)

#002736

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #100f5d;
/* rgb */ color: rgb(16, 15, 93);
/* oklch */ color: oklch(24.5% 0.131 271.7);

Tailwind

colors: {
  custom: {
    50: '#5f4f8c',
    500: '#100f5d',
    950: '#000000',
  },
}

SCSS

$custom: #100f5d;
$custom-light: #5f4f8c;
$custom-dark: #000000;

JSON

{
  "hex": "#100f5d",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 93
  },
  "hsl": {
    "h": 240.769,
    "s": 72.222,
    "l": 21.176
  },
  "oklch": {
    "l": 0.24457,
    "c": 0.13122,
    "h": 271.7
  },
  "luminance": 0.01242
}

Semantic roles & 50–950 ramp

primary

#100F5D

secondary

#959631

accent

#EF39ED

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020C

muted

#7A787D

Preview Lab

Preview with #100F5D

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

Preview Lab → · Contrast checker → · Palette generator →