#100B33#100B33

#100B33 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.8% C 0.075 H 282.0°. Best body text is #FFFFFF at 18.79:1 contrast (WCAG AA passes).

Color values

HEX	#100B33
RGB	rgb(16, 11, 51)
HSL	hsl(248, 65%, 12%)
HSV	hsv(248, 78%, 20%)
CMYK	cmyk(68.6%, 78.4%, 0%, 80%)
CIE-LAB	lab(5.32, 15.09, -24.94)
CIE-LCH	lch(5.32, 29.15, 301.18°)
OKLab	oklab(18.76% 0.0157 -0.0736)
OKLCH	oklch(18.76% 0.075 282)
XYZ	xyz(0.9307, 0.5885, 3.1959)
Luminance	0.0059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight

#03012D

ΔE00 2.98

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B33 #2E330B

analogous

#0B1A33 #100B33 #240B33

triadic

#100B33 #33100B #0B3310

tetradic

#100B33 #330B1A #2E330B #0B3324

square

#100B33 #330B1A #2E330B #0B3324

split-complementary

#100B33 #33240B #1A330B

monochromatic

#080519 #080519 #100B33 #201665 #302198

Accessibility & contrast

On white

18.79

#100B33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#100B33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B33

18.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B33	#FFFFFF	#000000	##FFFFFF
##100B33	1.00	18.79	1.12	18.79
#FFFFFF	18.79	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001334

Deuteranopia (green-blind)

#001032

Tritanopia (blue-blind)

#01151D

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #100b33;
/* rgb */ color: rgb(16, 11, 51);
/* oklch */ color: oklch(18.8% 0.075 282.0);

Tailwind

colors: {
  custom: {
    50: '#524b6b',
    500: '#100b33',
    950: '#000000',
  },
}

SCSS

$custom: #100b33;
$custom-light: #524b6b;
$custom-dark: #000000;

JSON

{
  "hex": "#100b33",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 51
  },
  "hsl": {
    "h": 247.5,
    "s": 64.516,
    "l": 12.157
  },
  "oklch": {
    "l": 0.18762,
    "c": 0.07526,
    "h": 282
  },
  "luminance": 0.00589
}

Semantic roles & 50–950 ramp

primary

#100B33

secondary

#67702A

accent

#E840D3

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020106

muted

#78777A

Preview Lab

Preview with #100B33

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

Preview Lab → · Contrast checker → · Palette generator →