#100B43#100B43

#100B43 is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.6% C 0.100 H 277.1°. Best body text is #FFFFFF at 18.25:1 contrast (WCAG AA passes).

Color values

HEX	#100B43
RGB	rgb(16, 11, 67)
HSL	hsl(245, 72%, 15%)
HSV	hsv(245, 84%, 26%)
CMYK	cmyk(76.1%, 83.6%, 0%, 73.7%)
CIE-LAB	lab(6.82, 22.63, -34.07)
CIE-LCH	lch(6.82, 40.90, 303.59°)
OKLab	oklab(20.61% 0.0123 -0.0987)
OKLCH	oklch(20.61% 0.1 277.1)
XYZ	xyz(1.3461, 0.7546, 5.3838)
Luminance	0.0076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B43 #3E430B

analogous

#0B2243 #100B43 #2C0B43

triadic

#100B43 #43100B #0B4310

tetradic

#100B43 #430B22 #3E430B #0B432C

square

#100B43 #430B22 #3E430B #0B432C

split-complementary

#100B43 #432C0B #22430B

monochromatic

#06041A #06041A #100B43 #1D1478 #291CAC

Accessibility & contrast

On white

18.25

#100B43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#100B43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B43

18.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B43	#FFFFFF	#000000	##FFFFFF
##100B43	1.00	18.25	1.15	18.25
#FFFFFF	18.25	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001745

Deuteranopia (green-blind)

#001342

Tritanopia (blue-blind)

#001B26

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #100b43;
/* rgb */ color: rgb(16, 11, 67);
/* oklch */ color: oklch(20.6% 0.100 277.1);

Tailwind

colors: {
  custom: {
    50: '#574b78',
    500: '#100b43',
    950: '#000000',
  },
}

SCSS

$custom: #100b43;
$custom-light: #574b78;
$custom-dark: #000000;

JSON

{
  "hex": "#100b43",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 67
  },
  "hsl": {
    "h": 245.357,
    "s": 71.795,
    "l": 15.294
  },
  "oklch": {
    "l": 0.20607,
    "c": 0.09951,
    "h": 277.1
  },
  "luminance": 0.00755
}

Semantic roles & 50–950 ramp

primary

#100B43

secondary

#78802A

accent

#EF39DE

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040109

muted

#79777B

Preview Lab

Preview with #100B43

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

Preview Lab → · Contrast checker → · Palette generator →