#100C57#100C57

#100C57 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.3% C 0.126 H 272.9°. Best body text is #FFFFFF at 17.32:1 contrast (WCAG AA passes).

Color values

HEX	#100C57
RGB	rgb(16, 12, 87)
HSL	hsl(243, 76%, 19%)
HSV	hsv(243, 86%, 34%)
CMYK	cmyk(81.6%, 86.2%, 0%, 65.9%)
CIE-LAB	lab(9.49, 29.65, -43.53)
CIE-LCH	lch(9.49, 52.67, 304.26°)
OKLab	oklab(23.27% 0.0065 -0.1259)
OKLCH	oklch(23.27% 0.126 272.9)
XYZ	xyz(2.0649, 1.0610, 9.1109)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C57 #53570C

analogous

#0C2E57 #100C57 #360C57

triadic

#100C57 #57100C #0C5710

tetradic

#100C57 #570C2E #53570C #0C5736

square

#100C57 #570C2E #53570C #0C5736

split-complementary

#100C57 #57360C #2E570C

monochromatic

#05041B #060521 #100C57 #1A138D #241BC3

Accessibility & contrast

On white

17.32

#100C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#100C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C57

17.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C57	#FFFFFF	#000000	##FFFFFF
##100C57	1.00	17.32	1.21	17.32
#FFFFFF	17.32	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E59

Deuteranopia (green-blind)

#001756

Tritanopia (blue-blind)

#002332

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100c57;
/* rgb */ color: rgb(16, 12, 87);
/* oklch */ color: oklch(23.3% 0.126 272.9);

Tailwind

colors: {
  custom: {
    50: '#5d4d87',
    500: '#100c57',
    950: '#000000',
  },
}

SCSS

$custom: #100c57;
$custom-light: #5d4d87;
$custom-dark: #000000;

JSON

{
  "hex": "#100c57",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 87
  },
  "hsl": {
    "h": 243.2,
    "s": 75.758,
    "l": 19.412
  },
  "oklch": {
    "l": 0.23271,
    "c": 0.12612,
    "h": 272.9
  },
  "luminance": 0.01061
}

Semantic roles & 50–950 ramp

primary

#100C57

secondary

#8D922D

accent

#F235E8

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05010B

muted

#79777C

Preview Lab

Preview with #100C57

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

Preview Lab → · Contrast checker → · Palette generator →