#100B3B#100B3B

#100B3B is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.7% C 0.088 H 279.3°. Best body text is #FFFFFF at 18.53:1 contrast (WCAG AA passes).

Color values

HEX	#100B3B
RGB	rgb(16, 11, 59)
HSL	hsl(246, 69%, 14%)
HSV	hsv(246, 81%, 23%)
CMYK	cmyk(72.9%, 81.4%, 0%, 76.9%)
CIE-LAB	lab(6.01, 19.00, -29.66)
CIE-LCH	lch(6.01, 35.23, 302.64°)
OKLab	oklab(19.66% 0.0142 -0.0865)
OKLCH	oklch(19.66% 0.088 279.3)
XYZ	xyz(1.1225, 0.6652, 4.2061)
Luminance	0.0066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B3B #363B0B

analogous

#0B1E3B #100B3B #280B3B

triadic

#100B3B #3B100B #0B3B10

tetradic

#100B3B #3B0B1E #363B0B #0B3B28

square

#100B3B #3B0B1E #363B0B #0B3B28

split-complementary

#100B3B #3B280B #1E3B0B

monochromatic

#07051A #07051A #100B3B #1E156F #2C1EA2

Accessibility & contrast

On white

18.53

#100B3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#100B3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B3B

18.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B3B	#FFFFFF	#000000	##FFFFFF
##100B3B	1.00	18.53	1.13	18.53
#FFFFFF	18.53	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153C

Deuteranopia (green-blind)

#00113A

Tritanopia (blue-blind)

#001822

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #100b3b;
/* rgb */ color: rgb(16, 11, 59);
/* oklch */ color: oklch(19.7% 0.088 279.3);

Tailwind

colors: {
  custom: {
    50: '#554b71',
    500: '#100b3b',
    950: '#000000',
  },
}

SCSS

$custom: #100b3b;
$custom-light: #554b71;
$custom-dark: #000000;

JSON

{
  "hex": "#100b3b",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 59
  },
  "hsl": {
    "h": 246.25,
    "s": 68.571,
    "l": 13.725
  },
  "oklch": {
    "l": 0.19658,
    "c": 0.08768,
    "h": 279.3
  },
  "luminance": 0.00665
}

Semantic roles & 50–950 ramp

primary

#100B3B

secondary

#70782A

accent

#EB3CD9

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030108

muted

#78777B

Preview Lab

Preview with #100B3B

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

Preview Lab → · Contrast checker → · Palette generator →