#100D54#100D54

#100D54 is a very dark, vivid blue. Relative luminance 0.010; OKLCH L 23.0% C 0.121 H 273.2°. Best body text is #FFFFFF at 17.39:1 contrast (WCAG AA passes).

Color values

HEX	#100D54
RGB	rgb(16, 13, 84)
HSL	hsl(243, 73%, 19%)
HSV	hsv(243, 85%, 33%)
CMYK	cmyk(81%, 84.5%, 0%, 67.1%)
CIE-LAB	lab(9.30, 27.98, -41.79)
CIE-LCH	lch(9.30, 50.30, 303.80°)
OKLab	oklab(23.03% 0.0068 -0.1209)
OKLCH	oklch(23.03% 0.121 273.2)
XYZ	xyz(1.9573, 1.0379, 8.4830)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D54 #51540D

analogous

#0D2E54 #100D54 #340D54

triadic

#100D54 #54100D #0D5410

tetradic

#100D54 #540D2E #51540D #0D5434

square

#100D54 #540D2E #51540D #0D5434

split-complementary

#100D54 #54340D #2E540D

monochromatic

#05041A #06051F #100D54 #1A1589 #241DBE

Accessibility & contrast

On white

17.39

#100D54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#100D54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D54

17.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D54	#FFFFFF	#000000	##FFFFFF
##100D54	1.00	17.39	1.21	17.39
#FFFFFF	17.39	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D56

Deuteranopia (green-blind)

#001753

Tritanopia (blue-blind)

#002330

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #100d54;
/* rgb */ color: rgb(16, 13, 84);
/* oklch */ color: oklch(23.0% 0.121 273.2);

Tailwind

colors: {
  custom: {
    50: '#5c4d85',
    500: '#100d54',
    950: '#000000',
  },
}

SCSS

$custom: #100d54;
$custom-light: #5c4d85;
$custom-dark: #000000;

JSON

{
  "hex": "#100d54",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 84
  },
  "hsl": {
    "h": 242.535,
    "s": 73.196,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23028,
    "c": 0.12112,
    "h": 273.2
  },
  "luminance": 0.01038
}

Semantic roles & 50–950 ramp

primary

#100D54

secondary

#8B8F2E

accent

#F038E8

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #100D54

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

Preview Lab → · Contrast checker → · Palette generator →