#100C53#100C53

#100C53 is a very dark, vivid blue. Relative luminance 0.010; OKLCH L 22.8% C 0.121 H 273.6°. Best body text is #FFFFFF at 17.51:1 contrast (WCAG AA passes).

Color values

HEX	#100C53
RGB	rgb(16, 12, 83)
HSL	hsl(243, 75%, 19%)
HSV	hsv(243, 86%, 33%)
CMYK	cmyk(80.7%, 85.5%, 0%, 67.5%)
CIE-LAB	lab(8.97, 28.21, -41.66)
CIE-LCH	lch(8.97, 50.32, 304.11°)
OKLab	oklab(22.76% 0.0075 -0.1205)
OKLCH	oklch(22.76% 0.121 273.6)
XYZ	xyz(1.9060, 0.9974, 8.2740)
Luminance	0.0100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C53 #4F530C

analogous

#0C2B53 #100C53 #330C53

triadic

#100C53 #53100C #0C5310

tetradic

#100C53 #530C2B #4F530C #0C5333

square

#100C53 #530C2B #4F530C #0C5333

split-complementary

#100C53 #53330C #2B530C

monochromatic

#05041B #06041E #100C53 #1A1488 #251BBE

Accessibility & contrast

On white

17.51

#100C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#100C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C53

17.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C53	#FFFFFF	#000000	##FFFFFF
##100C53	1.00	17.51	1.20	17.51
#FFFFFF	17.51	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D55

Deuteranopia (green-blind)

#001652

Tritanopia (blue-blind)

#00222F

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #100c53;
/* rgb */ color: rgb(16, 12, 83);
/* oklch */ color: oklch(22.8% 0.121 273.6);

Tailwind

colors: {
  custom: {
    50: '#5c4c84',
    500: '#100c53',
    950: '#000000',
  },
}

SCSS

$custom: #100c53;
$custom-light: #5c4c84;
$custom-dark: #000000;

JSON

{
  "hex": "#100c53",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 83
  },
  "hsl": {
    "h": 243.38,
    "s": 74.737,
    "l": 18.627
  },
  "oklch": {
    "l": 0.22757,
    "c": 0.12076,
    "h": 273.6
  },
  "luminance": 0.00998
}

Semantic roles & 50–950 ramp

primary

#100C53

secondary

#898E2D

accent

#F136E7

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100C53

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

Preview Lab → · Contrast checker → · Palette generator →