#100B5D#100B5D

#100B5D is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.9% C 0.135 H 272.2°. Best body text is #FFFFFF at 17.10:1 contrast (WCAG AA passes).

Color values

HEX	#100B5D
RGB	rgb(16, 11, 93)
HSL	hsl(244, 79%, 20%)
HSV	hsv(244, 88%, 36%)
CMYK	cmyk(82.8%, 88.2%, 0%, 63.5%)
CIE-LAB	lab(10.10, 32.28, -46.57)
CIE-LCH	lch(10.10, 56.66, 304.73°)
OKLab	oklab(23.93% 0.0052 -0.1347)
OKLCH	oklch(23.93% 0.135 272.2)
XYZ	xyz(2.3085, 1.1396, 10.4521)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B5D #585D0B

analogous

#0B2F5D #100B5D #390B5D

triadic

#100B5D #5D100B #0B5D10

tetradic

#100B5D #5D0B2F #585D0B #0B5D39

square

#100B5D #5D0B2F #585D0B #0B5D39

split-complementary

#100B5D #5D390B #2F5D0B

monochromatic

#05031B #070526 #100B5D #191194 #2318CA

Accessibility & contrast

On white

17.10

#100B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#100B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B5D

17.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B5D	#FFFFFF	#000000	##FFFFFF
##100B5D	1.00	17.10	1.23	17.10
#FFFFFF	17.10	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205F

Deuteranopia (green-blind)

#00185C

Tritanopia (blue-blind)

#002535

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #100b5d;
/* rgb */ color: rgb(16, 11, 93);
/* oklch */ color: oklch(23.9% 0.135 272.2);

Tailwind

colors: {
  custom: {
    50: '#5f4d8c',
    500: '#100b5d',
    950: '#000000',
  },
}

SCSS

$custom: #100b5d;
$custom-light: #5f4d8c;
$custom-dark: #000000;

JSON

{
  "hex": "#100b5d",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 93
  },
  "hsl": {
    "h": 243.659,
    "s": 78.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.23928,
    "c": 0.13484,
    "h": 272.2
  },
  "luminance": 0.0114
}

Semantic roles & 50–950 ramp

primary

#100B5D

secondary

#91982C

accent

#F532E9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010C

muted

#79777D

Preview Lab

Preview with #100B5D

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

Preview Lab → · Contrast checker → · Palette generator →