#100D53#100D53

#100D53 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.9% C 0.120 H 273.4°. Best body text is #FFFFFF at 17.43:1 contrast (WCAG AA passes).

Color values

HEX	#100D53
RGB	rgb(16, 13, 83)
HSL	hsl(243, 73%, 19%)
HSV	hsv(243, 84%, 33%)
CMYK	cmyk(80.7%, 84.3%, 0%, 67.5%)
CIE-LAB	lab(9.18, 27.62, -41.32)
CIE-LCH	lch(9.18, 49.70, 303.76°)
OKLab	oklab(22.9% 0.0071 -0.1195)
OKLCH	oklch(22.9% 0.12 273.4)
XYZ	xyz(1.9184, 1.0223, 8.2782)
Luminance	0.0102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D53 #50530D

analogous

#0D2D53 #100D53 #330D53

triadic

#100D53 #53100D #0D5310

tetradic

#100D53 #530D2D #50530D #0D5333

square

#100D53 #530D2D #50530D #0D5333

split-complementary

#100D53 #53330D #2D530D

monochromatic

#05041A #06051E #100D53 #1A1588 #241EBD

Accessibility & contrast

On white

17.43

#100D53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#100D53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D53

17.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D53	#FFFFFF	#000000	##FFFFFF
##100D53	1.00	17.43	1.20	17.43
#FFFFFF	17.43	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D55

Deuteranopia (green-blind)

#001652

Tritanopia (blue-blind)

#002230

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100d53;
/* rgb */ color: rgb(16, 13, 83);
/* oklch */ color: oklch(22.9% 0.120 273.4);

Tailwind

colors: {
  custom: {
    50: '#5c4d84',
    500: '#100d53',
    950: '#000000',
  },
}

SCSS

$custom: #100d53;
$custom-light: #5c4d84;
$custom-dark: #000000;

JSON

{
  "hex": "#100d53",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 83
  },
  "hsl": {
    "h": 242.571,
    "s": 72.917,
    "l": 18.824
  },
  "oklch": {
    "l": 0.22901,
    "c": 0.11976,
    "h": 273.4
  },
  "luminance": 0.01023
}

Semantic roles & 50–950 ramp

primary

#100D53

secondary

#8A8E2E

accent

#F038E8

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100D53

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

Preview Lab → · Contrast checker → · Palette generator →